MON Montero Mining and Exploration Ltd

Montero Mining and Exploration Ltd. (TSX VENTURE:MON) ("Montero") announces the
results from four additional surface trenches excavated on the Lower Nyati
Target upslope from the Tumbili Target area, at the Wigu Hill Rare Earth Project
in Tanzania. The positive results returned from these four trenches substantiate
the results reported recently from the Lower Nyati Target area (See News Release
dated 03/04/2012 and 10/04/2012).


Highlights of the results on wide trench intersections were found in trenches
WTRN004, WTRN006 and WTRN007 as follows:




--  2.24% TREO over 112.4m (incl. 3.92% TREO over 14m and 3.65% TREO over
    16m) 
--  3.04% TREO over 42.0m (Including 3.80% TREO over 20m) 
--  3.11% TREO over 44.0m (including 4.31% TREO over 14m) 

(All widths above are apparent widths, and trenches are as close as possible
to right angles to the strike of the carbonatites).                         



These latest positive trench results continue to confirm the extent of the
mineralization on the Lower Nyati Target. They substantiate the high-grade TREO
values returned from the grab and panel sampling program and from the initial
trenching and drilling results.




    Dr. Tony Harwood, President and Chief Executive Officer of Montero      
    commented, "The latest trenching results from the Lower Nyati Target    
    confirm the continuity of mineralization and strengthens our confidence 
    in that further drilling at the Nyati targets should increase the       
    resource substantially. Montero remains focused on de-risking the       
    project to support the fast-track to market strategy while seeking non- 
    equity funding via off-take or strategic partnerships."                 



The detailed exploration undertaken to date has covered less than half of the
anomalous area of rare earth interest. Despite limited exposure, drilling and
trenching has identified an extensive zone of carbonatite-hosted
bastnaesite-rich mineralization. The upside potential is still open ended and
the exploration focus will be the mineralized carbonatites zones identified here
and their continuation to the north and west. 


Abundant bastnaesite-rich mineralization occurs disseminated as fine and coarse
aggregated crystals in the dolomitic and sideritic carbonatite dikes. It is
within these mineralized carbonatites that the higher grade mineralization is
found. The intrusion of the carbonatite dikes has resulted in the assimilation
of the foliated gneiss host rock material as altered and partially mineralized
breccia fragments in the dikes. Where this dilution occurs, lower grade
carbonatite mineralization is found. 


To view the geological interpretation plan showing all of the trenches completed
to date with assays where available plus the current and proposed drilling
please visit: http://www.monteromining.com/projects/pdf/nyati-trench.pdf


Trenching at the Lower Nyati target

Initial reconnaissance exploration at the Lower and Upper Nyati Target areas has
established the potential for extensive rare earth mineralization within
bastnaesite-rich carbonatite dikes at Wigu Hill. The first three trenches
WTRN001/002/003 excavated at Nyati returned positive results. (See News Release
dated 03/04/2012) and four additional trenches WTRN004/005/006/007 have been
excavated at Lower Nyati to expose and evaluate the mineralized carbonatite
potential. Trench WTRN004 lies 200m to the south west of trenches WTRN001 and
002 and the results from this trench substantiate the strike extent and
continuity of the zones of mineralisation in trenches WTRN001/002 and in drill
hole NYT003. Trenches WTRN005/WTRN006/WTRN007 are positioned in the north west
part of the Lower Nyati target area and indicates mineralization with a
north-south strike. 


Trench WTRN006 straddles the outcrops adjacent to drill holes NYT004 and NYT005
and substantiates the continuity of the mineralization intersected in a
continuous zone in drill hole NYT005 which grades 2.83% TREO over an apparent
width of 105.00m. To the north of this along strike, Trench WTRN005 exposes
mineralization grading 2.68% TREO over 11m. Trench WTRN007 to the west of Trench
WTRN006 exposes a mineralized zone grading at 3.11% TREO over 44m. Further
excavations are necessary to follow up on these encouraging results. The value
of trenching in defining the underlying geology and mineralization is evident
from the results listed below:




----------------------------------------------------------------------------
                                          Apparent                          
Trench              From           To        width         TREO          SrO
number          (metres)     (metres)       metres      grade %      grade %
----------------------------------------------------------------------------
WTRN004                0        112.4       112.40         2.24         1.59
----------------------------------------------------------------------------
including          12.00        26.00        14.00         3.92         3.92
----------------------------------------------------------------------------
including          38.00        54.00        16.00         3.65         3.65
----------------------------------------------------------------------------
WTRN005            46.00        57.00        11.00         2.68         2.31
----------------------------------------------------------------------------
WTRN006             0.00         8.00         8.00         2.50         0.87
----------------------------------------------------------------------------
and                38.00        80.00        42.00         3.04         1.78
----------------------------------------------------------------------------
Including          60.00        80.00        20.00         3.80         3.01
----------------------------------------------------------------------------
and                88.00       100.60        12.60         2.44         1.66
----------------------------------------------------------------------------
WTRN007             0.00        44.00        44.00         3.11         1.17
----------------------------------------------------------------------------
Including          22.00        36.00        14.00         4.31         2.11
----------------------------------------------------------------------------
   Table 1. Graded assay results from 4 trenches on the Lower Nyati target  



The results from these four trenches together with previous trench and drill
hole information provide additional evidence and encouragement on which to base
a diamond drill hole exploration program to establish a resource from the Lower
Nyati target. 


QA/QC: Montero has used blanks, field duplicates and one analytical standard to
monitor the sampling and analytical quality. Results to date for the blank and
field duplicates show acceptable quality for the main REEs of interest. The
standard used was prepared on behalf of Montero using material from Wigu Hill
and has certified analytical values for Ce, La, Pr and Sm based on analyses from
16 different laboratories. A review of the results reported by ALS Chemex,
indicates that these meet the required level of analytical quality.


Qualified Person's Statement

The technical information contained in this press release has been reviewed by
Mr. Mike Evans, M.Sc. Pr.Sci.Nat. who is a qualified person for the purpose of
National Instrument 43-101 and a consulting geologist to Montero. Grab samples
are selective by nature and are unlikely to represent average grades on the
property.


About Montero Mining & Exploration 

Montero Mining and Exploration Ltd. is a mineral exploration and development
company engaged in its flagship Rare Earth Elements (REE) Project Wigu Hill in
Tanzania and has phosphate assets in South Africa and uranium assets in Tanzania
and Quebec, Canada. The flagship Wigu Hill REE Project is a high-grade,
undeveloped Light Rare Earth Element deposit, where the current focus is on
updating the initial NI 43-101 Mineral Resource Estimate and advancing the
hydro-metallurgical testwork with Mintek. Montero has a fast-track strategy to
advance a portion of the Wigu Hill deposit to the mining and production stage in
the short-term while further defining a larger deposit. With China's control
over export quotas, it is becoming imperative that the rest of the world
develops new rare earth resources to meet the increasing demand from "green"
technology and high-tech applications.


Montero's growth strategy is to develop and de-risk the Wigu Hill Rare Earth
Element project and to bring this to account through eventual rare earth
production and cash flow, while operating in an environmentally and socially
responsible manner. Montero trades on the TSX Venture Exchange under the symbol
MON.


Dr. Tony Harwood, President and CEO

CAUTIONARY STATEMENT: This News Release includes certain "forward-looking
statements". These statements are based on information currently available to
the Company and the Company provides no assurance that actual results will meet
management's expectations. Forward-looking statements include estimates and
statements that describe the Company's future plans, objectives or goals,
including words to the effect that the Company or management expects a stated
condition or result to occur. Forward-looking statements may be identified by
such terms as "believes", "anticipates", "expects", "estimates", "may", "could",
"would", "will", or "plan". Since forward-looking statements are based on
assumptions and address future events and conditions, by their very nature they
involve inherent risks and uncertainties. Actual results relating to, among
other things, results of exploration, project development, reclamation and
capital costs of the Company's mineral properties, and the Company's financial
condition and prospects, could differ materially from those currently
anticipated in such statements for many reasons such as: changes in general
economic conditions and conditions in the financial markets; changes in demand
and prices for minerals; litigation, legislative, environmental and other
judicial, regulatory, political and competitive developments; technological and
operational difficulties encountered in connection with the activities of the
Company; and other matters discussed in this news release. This list is not
exhaustive of the factors that may affect any of the Company's forward-looking
statements. These and other factors should be considered carefully and readers
should not place undue reliance on the Company's forward-looking statements. The
Company does not undertake to update any forward-looking statement that may be
made from time to time by the Company or on its behalf, except in accordance
with applicable securities laws.

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