CARLSBAD, Calif. - Authorities asked the public on Monday for help in identifying a man who robbed a North County bank last week.

The thief approached a teller at the Comerica branch office in the 2600 block of El Camino Real in Carlsbad and demanded money shortly after 4:30 p.m. Friday, according to the FBI.

The bandit -- who kept one of his hands thrust in a jacket pocket during the crime, as if holding a concealed gun -- fled with an undisclosed amount of cash in a white 1990s model extended-cab Toyota pickup truck.

Witnesses described him as a thin white man who was about 5 feet 5 inches tall and weighing about 145 pounds.

He had a small mustache and tattoos on his neck up to the jaw line. He was wearing dark brown pants, a gray hooded sweatshirt and a black baseball cap, the FBI reported.

Anyone with information about the robbery was asked to call San Diego County Crime Stoppers at (888) 580-8477.

Tipsters may remain anonymous and could be eligible for a reward of up to $1,000.