Kim Hyun-joong. Pic: AP.

SEOUL, South Korea (AP) — Police say popular South Korean singer and actor Kim Hyun-joong has acknowledged that he hit his then-girlfriend during an argument in May at his home in Seoul.

Police inspector Chung Chae-min said Wednesday that the woman, who also hit Kim, was struck multiple times and had bruises on her arms and scratches on her knees. She needed two weeks of hospital treatment.

Chung said that during questioning that ended early Wednesday morning, Kim acknowledged that he hit the woman. But Kim said the fight was mutual and they became entangled.

Chung said the woman filed charges against Kim last month, claiming the singer assaulted her multiple times between May and July.

The 28-year-old Kim debuted with the boy band SS501 in 2005. He is popular throughout Asia.