OAKLAND (KRON)— Oakland police are asking for the public’s help in finding a missing 56-year-old man at risk.

Jonathan Marinissen was last seen at his Oakland home on the 5100 block of Foothill Boulevard at 9 a.m. on Saturday.

Marinissen is described as a white man with brown eyes weighing 150 pounds and is about 6 feet 3 inches tall. He was last seen wearing a blue, long sleeved shirt.

Marinissen has schizophrenia, which is why police are considering him at risk.

Anyone with information about Marinissen’s whereabouts is asked to call the Oakland Police Missing Persons Unit at (510)238-3641.