Police say two men robbed the Lone Star Capital Bank at Weidner Road and Interstate 35 shortly after 2 p.m. Monday.
Sgt. Daniel Alonzo of the San Antonio Police Department said one of the men was armed with a shotgun and cocked the weapon during the hold-up, but did not point it directly at anyone.
John DeLoach said he was inside the bank during the robbery.
"It appeared to be a 20-gauge," said DeLoach. "They told everybody to get on the floor."
DeLoach said the man who didn't show a weapon demanded money from the teller and stuffed the cash into his pockets.
The men then left the bank and ran across and empty parking lot a fueling station near the bank. Police said a getaway vehicle was there waiting for him.
"A heavy-set Hispanic woman with long hair was driving what's believed to be a white, four-door Ford Focus," said Alonzo. "The men got in the car and headed back toward I-35."
Police said they are reviewing surveillance video for information on the suspects.
DeLoach describes the suspects as around 5-feet 8-inches tall and both weighing about 185 pounds. He said they both wore black hoodies, masks, baggy jeans and sunglasses.
Anyone with any information on the whereabouts of the suspects is asked to call Crime Stoppers at 210-224-STOP (7867).