An officer with the Cypress Police Department was arrested in Garden Grove on suspicion of sexual assault early Friday.

Garden Grove police responded to the 5500 block of Ludlow Avenue after the man called the department at around 3:45 a.m., authorities said.

The man and the off-duty officer met at a nearby bar and drove together to the officer’s residence. Once there, police said, the man was sexually assaulted. The victim was able to leave and called police, according to a Garden Grove police news release.

When Garden Grove officers arrived at the house, the Cypress officer initially refused to open the door or answer any phone calls, police said. But officers were able to persuade him to eventually come out of the home and he was arrested.

The Garden Grove Police Department did not release the name of the arrested officer. “Detectives are conducting further investigation and the suspect’s information will be released at a later time,” Garden Grove Police Lt. Carl Whitney said.

Cypress police officials are assisting Garden Grove detectives.

The Cypress officer was placed on administrative leave until an internal affairs investigation is completed.