DAMATURU, Nigeria — A suicide bomber blew herself up at a crowded bus station in this northeastern Nigerian city on Sunday, killing 10 people and wounding 30, the police said. Damaturu is in a region that is frequently attacked by Islamist militants.

Adamu Muhammad, a witness, said he heard a blast before the people at the bus station “descended into panic.”

No one claimed responsibility for the attack, which bore the hallmarks of the Islamist insurgent group Boko Haram, whose use of female suicide bombers has been an emerging trend over the past year.

According to a report by The Associated Press, the bomber somehow made it through a security check at the entrance to the station and detonated her explosive at 1 p.m. local time. The report quoted a witness as saying that the bomber appeared to be about 16.