Two prison guards are under investigation for sex assaults on inmates at the Women’s Community Correctional Center in Kailua, police said.

A female correctional officer was arrested Monday for investigation of multiple sex assaults on a WCCC inmate in October. The 36-year-old guard, who has been with the Department of Public Safety since 2004, was arrested on suspicion of five counts of second-degree sex assault and one count of third-degree sex assault.

The alleged attacks were reported by a 31-year-old female inmate who said the assaults occurred between Oct. 2 and 25 at the prison.

The guard was released about an hour after she turned herself in to authorities at the main police station on South Beretania Street on Monday. No charges have been filed and the investigation is ongoing.

The suspect was temporarily assigned to the Halawa Correctional Facility in November, prison officials reported.

“An internal administrative investigation is being conducted, as is standard procedure whenever there are allegations of abuse reported,” said Toni Schwartz, a spokeswoman for the prison facilities.

Last week a 38-year-old male prison guard was arrested for multiple incidents of alleged sexual assault on three WCCC inmates over a two-year period.

The police said the female victims, ages 30, 31 and 34, were allegedly assaulted from March 2013 to November 2015.

The guard, who was hired in October 2007, was temporarily transferred in January to the minimum-security Waiawa Correctional Facility.

Neither the police nor DPS released any more information about the cases.