All amounts are expressed in Canadian dollars.

TSX: IMG NYSE: IAG

TORONTO, April 3, 2013 /PRNewswire/ – IAMGOLD Corporation (“IAMGOLD” or the “Company”) today announced that, indirectly through a
wholly owned subsidiary, it has acquired, as a result of a subscription
to a private placement in the amount of $150,000, an additional
1,500,000 common shares of GoldON Resources Ltd. (“GoldON”) and
1,500,000 warrants to acquire an equivalent number of common shares of
GoldON. GoldON, which is focused on exploration in northern Ontario,
was formerly known as Newcastle Minerals Ltd. Each warrant entitles the
purchase of one common share for $0.15 in the first year and $0.20 in
the second year of issuance.

IAMGOLD’s current indirect ownership of 3,500,000 common shares of
GoldON represents approximately 13.6% of the outstanding common
shares. If the 1,500,000 common share purchase warrants were to be
exercised, its indirect ownership would increase to 5,000,000 common
shares of GoldON, or approximately 18.4% of the outstanding common
shares.

The common shares and warrants to purchase common shares of GoldON
acquired indirectly today by IAMGOLD were acquired for investment
purposes. IAMGOLD does not have any present intention to acquire
ownership of, or control or direction over, additional securities of
GoldON. It is the intention of IAMGOLD to evaluate its investment in
GoldON on a continuing basis, and such holdings may be increased
(including increases resulting from the exercise of the warrants) or
decreased in the future.

Forward Looking Statement

This news release contains forward-looking statements. All statements,
other than of historical fact, that address activities, events or
developments that the Company believes, expects or anticipates will or
may occur in the future (including, without limitation, statements
regarding the estimation of mineral resources, exploration results,
potential mineralization, potential mineral resources and mineral
reserves) are forward-looking statements. Forward-looking statements
are generally identifiable by use of the words “may”, “will”, “should”,
“continue”, “expect”, “anticipate”, “estimate”, “believe”, “intend”,
“plan” or “project” or the negative of these words or other variations
on these words or comparable terminology. Forward-looking statements
are subject to a number of risks and uncertainties, many of which are
beyond the Company’s ability to control or predict, that may cause the
actual results of the Company to differ materially from those discussed
in the forward-looking statements. Factors that could cause actual
results or events to differ materially from current expectations
include, among other things, without limitation, failure to establish
estimated mineral resources, the possibility that future exploration
results will not be consistent with the Company’s expectations, changes
in world gold markets and other risks disclosed in IAMGOLD’s most
recent Form 40-F/Annual Information Form on file with the United States
Securities and Exchange Commission and Canadian provincial securities
regulatory authorities. Any forward-looking statement speaks only as of
the date on which it is made and, except as may be required by
applicable securities laws, the Company disclaims any intent or
obligation to update any forward-looking statement.

About IAMGOLD

IAMGOLD (www.iamgold.com) is a leading mid-tier gold producer with six operating gold mines
(including current joint ventures) on three continents. In the Canadian
province of Qu bec, the Company also operates Niobec Inc., one of the
world’s top three producers of niobium, and owns a rare earth element
resource close to its niobium mine. IAMGOLD is well positioned for
growth with a strong financial position and extensive management and
operational expertise. To grow from this strong base, IAMGOLD has a
pipeline of development and exploration projects and continues to
assess accretive acquisition opportunities. IAMGOLD’s growth plans are
strategically focused on certain regions in Canada and select countries
in South America and Africa.

Please note:
This entire news release may be accessed via fax, e-mail, IAMGOLD’s
website at www.iamgold.com and through CNW Group’s website at www.newswire.ca. All material information on IAMGOLD can be found at www.sedar.com or at www.sec.gov.

Si vous d sirez obtenir la version française de ce communiqu , veuillez
consulter le http://www.iamgold.com/French/Home/default.aspx.

For further information:
IAMGOLD has filed an early warning report on GoldON Resources Ltd’s
SEDAR profile at www.sedar.com. A copy of the report may be obtained by contacting Laura Young at 416
933 4952.

SOURCE IAMGOLD Corporation