PORTLAND, Ore. (AP) -- The superintendent of the Oregon State Hospital is calling for an expanded Oregon State Police investigation following the arrest of a custodian at the hospital's Portland campus.

Police say Francisco Nunez of Milwaukie has been accused of sodomy and official misconduct after a fellow hospital staff member witnessed him having sex with a female patient. Nunez is being held in the Multnomah County Jail on $1.1 million bail.

Hospital superintendent Roy Orr has asked the Oregon State Police to expand its investigation to ensure the safety of all patients on the Portland campus.

The state Department of Human Services also plans an internal investigation.