(Updated at 5:25 p.m.) Metro Transit Police are investigating a sexual assault that occurred last night on a Yellow Line train.

Metro says three men assaulted a woman, grabbing her inappropriately, after she refused to perform a sexual act.

The assault took place on a train near the Braddock Road Metro station. Transit Police investigated the incident at the Crystal City Metro station Thursday night, just before 10 p.m., prompting delays on the Blue and Yellow lines.

Late Friday afternoon, Metro released a press release (below) and surveillance images of the suspects (above).