KANSAS CITY, Mo. -- FBI agents have released surveillance pictures of a bank heist Friday morning at Union Bank in the 200 block of West Gregory Boulevard.

Investigators said a man walked up to a teller at about 9:45 a.m. and demanded money. The robber showed a handgun in his waistband, authorities said.

The robber is described as being in his late 20s or early 30s. He is 6 feet tall and 220 pounds, and he was last seen wearing a white or gray Pepe shirt with blue jeans.

Three customers were in the bank at the time of the robbery. No one was hurt.