Authorities are investigating allegations that Sacramento Kings' player Justin Williams sexually assaulted a female acquaintance, a Sacramento Police Department spokesman said Thursday.

Team spokesman Troy Hanson said Williams has been given an indefinite leave of absence and returned to Sacramento from a road trip to New Mexico to obtain a lawyer, a step recommended by team officials.

Hanson would not say whether the team planned to suspend Williams. The reserve center has not been charged and is cooperating with officers, police Sgt. Matt Young said.

"We recently became aware of a complaint involving Justin Williams that apparently is being investigated by the Sacramento police," Hanson said. "We are currently in the process of evaluating any additional information that becomes available to us."