Two veteran Los Angeles Police Department officers who worked as partners at the Hollywood Division have been charged with repeatedly sexually assaulting four women, often while they were on duty.

The Los Angeles County District Attorney’s Office announced Wednesday that James Nichols, 44, and Luis Valenzuela, 43, are scheduled to be arraigned today in Department 30 at the Foltz Criminal Justice Center. Prosecutors will ask that bail be set at $3.83 million for Nichols and $3.76 million for Valenzuela. The case was filed Tuesday.

Deputy District Attorneys Stephanie Sparagna and Ann Marie Wise with the Justice System Integrity Division are prosecuting the case.

From December 2008 through March 2011, the officers allegedly sexually assaulted women at different locations, including in the officers’ police vehicle, prosecutors said. All four women were arrested by the officers during narcotics-related offenses.

At the time the alleged assaults occurred, the victims were 19, 24, 25 and 34 years of age. Most but not all of the alleged assaults occurred while the officers were on duty.

Nichols and Valenzuela are charged with multiple counts each of sexual assault, including forcible rape, rape under color of authority, oral copulation under color of authority and oral copulation by force.

Valenzuela is also charged with one count of assault with a firearm for allegedly pointing a gun at one of the victims. If convicted, Nichols and Valenzuela each face up to life in state prison.

Both officers were previously relieved from duty. Los Angeles Police chief Charlie Beck released a statement after the charges were announced.

“Any officer that abuses the public’s trust is not welcome in the LAPD and we will continue vigorously investigating officers accused of alleged crimes and cooperate fully with the district attorney’s office,” Beck said.