A registered sex offender on parole was arrested Thursday for allegedly standing outside a Long Beach house and masturbating while watching a 15-year-old girl inside on a couch, police said.

Officers were dispatched to the house in the 1800 block of Pacific Avenue, near Pacific Coast Highway, just before 4 a.m., Long Beach Police Detective Jennifer Arzola said.

The preliminary investigation revealed that the suspect peaked through a break in the window’s blinds and masturbated while the victim, who was clothed, laid on the living room couch, Arzola said.

Police collected video evidence, and about 10:40 a.m., Luis Cedeno, 29, was arrested at his home in West Long Beach, according to police.

Cedeno was booked on suspicion of indecent exposure, peeping and a violation of his parole, police said. He was being held without bail, according to jail records.