Ismaël Omar Mostefaï, a 29-year-old French citizen, was identified Sunday as one of the attackers at the Bataclan concert hall, where at least 89 were killed on Friday.

In a press release obtained by The Huffington Post, a Turkish official said the country turned up Mostefaï’s name when investigating four other terror suspects in 2014. “During the official investigation, the Turkish authorities identified a fifth individual, Omar Ismail Mostefai, and notified their French counterparts twice — in December 2014 and June 2015,” the official said. 

Turkey shared information on Mostefaï with France, but didn’t hear anything back — until after Friday’s events.