Police say a dangerous man who escaped from Hawaii's psychiatric hospital is believed to be in Northern California.

Honolulu police say Randall Saito is considered extremely dangerous. He was acquitted of a 1979 murder by reason of insanity and committed to the hospital.

Police say he left the hospital Sunday, took a taxi to a chartered plane to Maui and then boarded another plane to San Jose, California.

Police say he arrived in San Jose two hours before hospital staff reported his disappearance.

Hawaii State Hospital Administrator William May said Tuesday that officials are fully cooperating with law enforcement and appropriate steps would be taken if Saito had help from someone inside the facility.

He says the hospital will conduct an internal review once Saito is returned to custody and a criminal investigation is complete.