An East County registered sex offender was arrested when investigators conducting a routine compliance check found him with a young boy who claimed to have been repeatedly molested by him, police reported today.

The detectives found the youth in 35-year-old Garth Gumienny's residence in the 4500 block of Parks Avenue in La Mesa on Tuesday, Capt. Ed Aceves said.

When questioned, the boy alleged that Gumienny had sexually assaulted him "numerous times," the captain said.

Gumienny, who has been convicted of similar crimes in the past, was booked into county jail on suspicion of 10 child-molest counts, according to Aceves.