HAYWARD -- A 34-year-old Hayward man has not been seen for five days and his relatives are worried for his safety, police said.

Nijel Jay was reported missing on Wednesday, but he was last seen at his job in Alameda about 11 p.m. last Sunday, said Sgt. Mark Ormsby.

Ormsby said police don't know his work schedule or if he missed work this past week.

He has not been heard from since he reportedly posted an unrelated message on Facebook about 1:30 a.m. Monday, police said. His car was found parked on Cary Avenue in East Oakland on Wednesday, Ormsby said.

"That is the only thing that looks suspicious, but (it) could be a voluntary disappearance,'' Ormsby said.

Ormsby added that there was nothing in the car, such as his wallet, cell phone or keys, that would indicate he was taken against his will. His cell phone was turned off Monday, police said.

Police said the man is in good physical condition, but investigators did not have information about his mental state.

Jay has no history of failing to contact his family or friends, police said.

His family told police his disappearance is suspicious but they were not immediately available Friday afternoon.

He is described as 5 foot 8 and weighing about 200 pounds. He has black hair and brown eyes.

Anyone with information on Jay's whereabouts should Hayward police at 510-293-7000.

Reach Kristin J. Bender at kbender@bayareanewsgroup.com. Follow her at Twitter.com/kjbender.