A man was shot and killed execution style early Tuesday in an Applebee's in Mercer County, authorities said.

The the victim was sitting at the bar about 12:30 a.m. when a gunman walked up and shot him in the head in the restaurant on Route 1 in Lawrence Township, police said.

The shooter left the restaurant and fled in a vehicle.

Investigators remained at the restaurant for hours after the shooting, collecting evidence and questioning witnesses.

The motive is under investigation, but police said it appeared the victim was targeted,