SEMAFO Inc.
TSX : SMF

SEMAFO Inc.

June 13, 2007 10:13 ET

Mana - Extension of the Wona deposit intersects 3.42 g/t Au over 50 meters

MONTREAL, June 13 - SEMAFO (TSX - SMF) is pleased to provide
an update on the 2007 exploration program at the Mana Gold project. During the
current year U$3.5M is being invested in exploration at Mana with the
objective of increasing reserves and resources.

Semafo has discovered that the Wona deposit, which is advantageously
situated in close proximity to the Mana plant, extends in a north-east
direction. Drilling has been carried out on the extension showing
mineralization, the best result being hole WDC46 returning 3.42 g/t Au over
50 meters, the details of which are noted below. Geophysical work was also
carried out, identifying the Wona structure over an additional 3 Km. In light
of the positive drill and geophysical results, a new extensive drilling
program will take place this summer.

Semafo's properties in Burkina Faso are within the Houndé
volcano-sedimentary belt. As described in previous technical reports, more
than one mineralization type were recognized, such as Nyafé that is a vein
type in sheared volcanics and Wona that is meta-sediments hosted. The latter
is related to silicification often brecciated and generally proximal to a
graphitic horizon.

Early 2007 core drilling program, targeting potential deep extension of
both Nyafé and Wona returned significant potential under the North part of
Wona with hole WDC39 (3.94 g/t Au over 11 meters). Furthermore, WDC38 opened
the North-East extension of the Wona deposit with 3.94 g/t Au over 10 meters
plus 4.34 g/t Au over 9 meters. Hole WDC46 was drilled some 290 meters beyond
reserves, returning 3.42 g/t Au (capped at 15 g/t Au, 3.52 uncapped) over
50 meters. RC drilling followed the diamond drill program confirming the
mineralized horizon however showing lower grades and thickness near surface.
The table below details all intersections crossing the mineralization plane of
the extension. The attached 3D drawing shows in red, the known mineralization
hosting Wona pit, in green, the newly discovered extension and in blue, the
trend along which exploration will continue. This image demonstrates the
former drilling being just off the zone due to a curve in the ore trend. Both
core and RC drilling was executed by Boart Longyear.

http://files.newswire.ca/357/Mana_Wona.pdf

http://files.newswire.ca/357/Geophy_Map.pdf



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Deeper zones
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Hole ID Coord X Coord Y Coord Z Grade Length
Au(g/t) (meters)
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WDC38 13338 16700 5144 3.94 10
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12355 16700 5121 4.34 9
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WDC39 12373 16500 5157 3.94 11
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(capped at 15g/t)
WDC46 12311 16900 5076 3.42 50
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WRC312 12349 16700 5253 2.69 12
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12361 16700 5238 2.58 3
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WRC314 12276 16900 5294 1.14 10
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12326 16900 5234 1.31 14
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12331 16900 5228 1.06 4
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Note: Average surface elevation is 5330


-------------------------------------------------------------------------
Upper zones
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Hole ID Coord X Coord Y Coord Z Grade Length
Au(g/t) (meters)
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WRC313 12361 16700 5299 2.30 8
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WRC315 12337 16800 5248 1.73 7
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WRC63 12362 16700 5325 NV
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WRC64 12354 16800 5323 NV
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WRC85 12355 16700 5281 2.94 3
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WRC90 12319 17000 5297 1.42 4
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Note: Average surface elevation is 5330


Based on these positive results, an IP geophysic program was executed by
Sagax Afrique, extending to local coordinates 19200N whereby the former survey
ended at 16200N. The second image presents residual resistivity results. An
échelon is recognized in the area of recent drilling, with the Wona's
signature appearing to continue on the surveyed area. That resistive horizon
may correspond to the silicified ore bearing Wona structure. Near surface low
grades recently drilled coincide with the resistivity échelon (16500N to
16900N). Better mineralization may reappear with resuming high signal, still
keeping deep potential. Exploration will carry on in this area with an RC
program being initiated this summer.

The drilling programs were designed and managed locally by Dofinta Bondé,
Mana Mineral's Exploration Chief Geologist and reviewed and supervised under
the direction of Michel Crevier P.Geo MScA, Geology Manager and Semafo's
Qualified Person who has reviewed this press release for accuracy and
compliance with the Canadian Instrument 43-101.

All individual samples represented one-meter length of drilling which were
split in half for core and RC drilling cuttings riffled spit to end to 1 Kg
sample. One half core or a 1 Kg RC sample was kept on site as a control and an
equivalent sized sample was then sent for preparation and gold assaying at the
Abilab laboratories in Ouagadougou, Burkina Faso. Each sample was fire assayed
for gold content on a 50 gram pulp sub-sample at the same Abilab laboratories.
Complementing Abilab's own QA/QC (Quality Assurance / Quality Control)
program, an QA/QC program was in place throughout the sampling program, using
blind duplicates and recognized industry standards.



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Semafo Inc. invites you to participate in a conference call to discuss
these results:

Date: Thursday, June 14, 2007
Time: 8:00 AM (ET)
Tel. local & overseas: 1-514-807-8791
Tel. North America: 1-800-595-8550

The replay will be available as of 11:00 a.m. June 14th to 11:59 p.m.
June 21, 2007 by dialing (877) 289-8525, passcode 2123 6474#
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The common shares of Semafo are traded on The Toronto Stock Exchange under the symbol "SMF".

FORWARD-LOOKING STATEMENTS

This press release contains "forward-looking statements", including, but
not limited to, the statements regarding the Company's expectations as to the
market price of gold, strategic plans, future commercial production,
production targets, timetables, mine operating costs, fixed assets expenses,
mineral reserve estimates and to the company's perspectives. Forward-looking
statements express, as at the date of this press release, our estimates,
forecasts, projections, expectations and beliefs as to future events or
results. Forward-looking statements are reasonable, but involve a number of
risks and uncertainties, and there can be no assurance that such statements
will prove to be accurate. Therefore, actual results and future events could
differ materially from those anticipated in such statements. Factors that
could cause results or events to differ materially from current expectations
expressed or implied by the forward-looking statements include, but are not
limited to, factors associated with fluctuations in the market price of
precious metals, mining industry risks, uncertainty as to calculation of
mineral reserves, risks related to the grade of reserves, risks related to
hedging strategies, risks of delays in construction and requirements of
additional financing.

Semafo is a mining company whose mission is to explore, develop and mine major gold deposits in West Africa. Semafo currently operates the Kiniero mine in Guinea, the Samira Hill mine in Niger and is developing the Mana project in Burkina Faso

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