Montréal, Québec, February 5, 2015 - IAMGOLD Corporation ("IAMGOLD" or the "Company") today provided an update from its ongoing exploration program at its optioned Monster Lake project located 50 kilometres southwest of Chibougamau, Quebec, Canada. The company is reporting assay results from a further 17 diamond drill holes totaling 8,233 metres completed at the end of the 2014 exploration program.

The assay results are provided in Table 1 below and include the following highlights:

(A drill hole plan map and longitudinal section is attached to this news release.)

325 - Megane Zone:

• Drillhole ML14-130: 9.18 metres grading 46.33 g/t gold,
• Includes: 2.2 metres grading 182.8 g/t gold
• Drillhole ML14-131: 3.42 metres grading 18.68 g/t gold

Craig MacDougall, Senior Vice President, Exploration for IAMGOLD, stated, "Our first exploration program completed in 2014 on this project has delivered encouraging results by successfully extending the high grade 325 - Megane zone at depth below previous drilling where it remains open. In addition our exploration program has identified several new gold-bearing structures and a number of target areas for further exploration."

During 2014, the Company conducted a multi-phase diamond drilling program totaling 12,761 metres. This news release reports the assay results of the final 17 of the 26 drill holes in the program. The 2014 drilling program was designed to test the direct down-dip and lateral extensions of the 325-Megane mineralized zone, as well as areas along strike within the interpreted structural corridor referred to as the Monster Lake Shear Zone ("MLSZ").

Concurrent with the 2014 drilling program, exploration activities also included data compilation and processing, a ground geophysical survey, geological mapping and selected outcrop stripping and sampling. Highlights of this work include the discovery of several new surface gold showings thought to represent a possible extension of the MLSZ located along the west limb of a prominent fold. Results from surface channel sampling of outcrops exposed in shallow trenches cut perpendicular to the observed trend, include: 1.25 metres grading 16.3 g/t Au, 0.30 metres grading 4.53 g/t Au and 0.60 metres grading 2.09 g/t Au in Trench 7; and 1.0 metres grading 2.83 g/t Au and 1.0 metre grading 2.09 g/t Au in Trench 9. These new showings have not been previously drill tested and represent priority targets for follow up.

Next Steps

In 2015, an initial 5,000 metre, winter diamond drilling program is planned which is designed to test selected target areas along the main MLSZ structure to take advantage of the winter access conditions. Further drilling is also planned on the 325-Megane zone to test the continuation of lateral and down-plunge extensions. Drilling is expected to commence in the coming weeks.

About the Monster Lake Project

The Monster Lake project is underlain by Archean volcanic rocks of the Obatogamau Formation and is traversed by an important deformation corridor and associated gold-bearing mineralized structures. Historical drilling and recent success by TomaGold have identified at least a four kilometre long structural corridor along which most of the known gold occurrences discovered to date on the property are associated, including the 325-Megane Zone.

Pursuant to an earn-in agreement finalized with TomaGold Corporation, IAMGOLD may earn a 50% interest in each of the Monster Lake, Winchester and Lac à l'Eau Jaune properties, collectively referred to as the Monster Lake Project, by completing scheduled cash payments and exploration expenditures totaling US$17.6 million over five and half years.

Technical Information and Quality Control Notes

The drilling results contained in this news release have been prepared in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects ("NI 43-101").

The "Qualified Person" responsible for the supervision of the preparation and review of this information is Marie-France Bugnon, P. Geo., General Manager Exploration. Marie-France is considered a "Qualified Person" for the purposes of National Instrument 43-101 with respect to the technical information being reported on. The technical information has been included herein with the consent and prior review of the above noted Qualified Person. The Qualified person has verified the data disclosed, and data underlying the information or opinions contained herein.

The sampling of, and assay data from, drill core is monitored through the implementation of a quality assurance - quality control (QA-QC) program designed to follow industry best practice. Drill core (NQ size) samples are selected by the IAMGOLD geologists and sawn in half with a diamond saw at the project site. Half of the core is retained at the site for reference purposes. Sample intervals may vary from half a metre to one and a half metres in length depending on the geological observations.

Samples are transported in sealed bags to the AGAT Laboratory prep lab facility in Val-d'Or, Québec. Samples are coarse crushed to a -10 mesh and then a 1000 gram split is pulverized to 95% passing -150 mesh. Analytical pulps are forwarded for analysis at the AGAT Laboratories (ISO / IEC 17025 Certified by the Standards Council of Canada) in Mississauga, Ontario. Samples are analyzed using a standard fire assay with a 50 gram charge with an Atomic Absorption (AA) finish. For samples that return assay values over 5.0 grams per tonne (g/t), another pulp is taken and fire assayed with a gravimetric finish. Core samples showing visible gold or samples which have returned values greater than 10.0 g/t are re-analyzed by pulp metallic analysis. IAMGOLD inserts blanks and certified reference standard in the sample sequence for quality control.

About TomaGold Corporation

TomaGold Corporation is a Canadian-based mining exploration company whose primary mission is the acquisition, exploration and development of gold projects in Canada and abroad.

Neither the TSX Venture Exchange nor its regulation services provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release. The statements made in this news release that are not historical facts are "forward-looking statements". Readers are cautioned that any such statements are not guarantees of future performance, and that actual developments or results may vary materially from those described in these "forward-looking" statements.

A table and maps are available at the following address: http://media3.marketwire.com/docs/990819e.pdf