CHIBA (Kyodo) A man arrested last month for allegedly killing a Chiba woman and abducting her daughter to Okinawa, by air, was charged Thursday with murder and violating weapons law.

Hiroyuki Nakada, 28, stands accused of bludgeoning to death Aiko Toyoda, 61, with a sledge hammer in a Chiba apartment on July 18. He had dated Toyoda's daughter, Tomomi, 22, and, according to an investigation, took her by car to Tochigi Prefecture that day. The two then flew from Tokyo's Haneda airport to Naha, Okinawa, the following day and visited an aquarium and a beach.

Prosecutors did not reveal whether Nakada has confessed, and are continuing to probe the alleged abduction. Nakada was arrested in Naha on July 23.

Chiba police say Nakada and the daughter began to go out after meeting through an online dating service around January. They broke up around June, but Nakada took her to Aichi Prefecture against her will in July and she consulted the police twice afterward, claiming she was being stalked.