Officers responded to a reported armed robbery at a Bank of the West located at 5007 Lone Tree Way at 12:25 p.m., according to the Antioch Police Department.
Witnesses told police that three men in their late teens to early 20s got out of a late model gray Honda Civic parked in front of the bank with their faces partially covered. One suspect was carrying a rifle, one had a stun gun and the third had a pistol.
The robbers, who were in the bank for about two minutes, demanded money and reportedly threatened to shoot customers and employees, according to police.
They fled in the Honda that was possibly driven by a fourth suspect. The car had a spoiler on the back and a blue-and-white paper rear plate.
Anyone who might have information regarding the robbery is urged to contact Antioch police Sgt. Diane Aguinaga at (925) 779-6928.