IAMGOLD Corporation provided results from its 2017 drilling program at the Diakha deposit on its Siribaya project in Western Mali. In 2017, the company completed a combined diamond and Reverse Circulation ("RC") drilling program designed to infill and increase confidence in the current resource as well as target expansions of the Diakha deposit. Assay results are reported herein for 105 drill holes totaling 19,520 metres. Infill Drill Holes: SRD17-198: 26.0 metres grading 6.79 g/t Au Including: 8.0 metres grading 20.52 g/t Au; SRD17-205: 18.0 metres grading 11.06 g/t Au Including: 6.0 metres grading 32.45 g/t Au; and SRD17-215: 13.0 metres grading 2.81 g/t Au and 26.0 metres grading 2.62 g/t Au. Expansion Drill Holes: SRD17-217: 16.0 metres grading 4.70 g/t Au Including: 4.0 metres grading 16.11 g/t Au; SRD17-226: 10.0 metres grading 5.16 g/t Au; SRC17-687: 16.0 metres grading 7.65 g/t Au Including: 4.0 metres grading 28.94 g/t Au; SRC17-704: 50.0 metres grading 2.01 g/t Au Including: 4.0 metres grading 9.70 g/t Au. In 2018, approximately 15,000 metres of drilling is planned to continue defining and expanding resources at the Diakha deposit as well as to explore other identified priority targets. All results will be used to refine the deposit model and will be incorporated into an updated resource estimate expected by year end.