Twitter announced on Friday it has been working aggressively to combat terrorists using its service since the middle of last year, though that fact was not shared with the public until now.

“Since the middle of 2015 alone, we’ve suspended over 125,000 accounts for threatening or promoting terrorist acts, primarily related to ISIS,” Twitter said in a statement. It added that the size of teams that review flagged accounts has also grown, and that content related to terrorism was beginning to shift off the site as a result.