A 17-year-old Romanian in custody admitted Friday that he was involved in the robbery-slaying of a woman on a street in Tokyo's Kichijoji area and was promptly served an arrest warrant for the crime, police said, adding they are also looking for his 18-year-old Japanese alleged accomplice.

The victim, Arisa Yamada, 22, a part-time worker, was found dead early Thursday in Musashino, western Tokyo, the police said, adding that she had been stabbed in the back and arm.

The Romanian national, whose name is being withheld because he is a minor, owned up to the attack, and the police quoted him as saying, "I looked for a woman walking alone because I wanted money to go out."