A missing boy has been found in Phoenix with a man wanted on a child sex charge.

13-year-old Justin Terlecki apparently took a bus to Arizona from his home in Milwaukee at the urging of a man he met online.

Investigators tracked an e-mail address to the apartment of 32-year-old Vernon Monk (search) and officers were waiting when he and the boy drove up.

Phoenix police say Monk was arrested for investigation of custodial interference and failure to register in Arizona as a sex offender (search). They say the man also is wanted on an Oklahoma warrant for a sexual offense against a minor.

The boy's mother says he'd been communicating with adults on the Internet despite safeguards and blocks she put on his computer.