Two men have been arrested on suspicion of committing robbery causing injury after they allegedly attacked a woman at her apartment in the city of Yokohama, with police investigating their possible involvement in nearly 10 other similar incidents, some involving sexual assault.

According to the Kanagawa Prefectural Police, the suspects ¡ª Ken Murakami, 45, and Yukio Kaji, 41 ¡ª have admitted to the allegations.

Investigators said the pair, who do not have fixed addresses, had each been released from prison earlier this year after having served time for robbery and other offenses.