TOKYO (AP) — Japan’s hugely popular female pop group AKB48 canceled fan events Monday after a saw-wielding man attacked two members and a staffer, shocking the nation and raising questions over security.

The two group members, Anna Iriyama, 18, and Rina Kawaei, 19, suffered hand and head injuries, and the male staffer who tried to stop the attack Sunday at a fan event in northern Japan had cuts on his hand. All three left the hospital by late Monday.