A man brandishing a handgun robbed the BB&T bank at 1130 Beaver Creek Commons Drive shortly before 10 a.m., police said. No injuries were reported.
Police said the robber rode a bicycle to the bank but grabbed a bank employee's keys and fled in the person's car.
Officers found the car abandoned behind the movie theater at the nearby Beaver Creek Commons shopping center, police said.
The robber was described as a white man, approximately 6 feet tall with a thin build. He was wearing a black shirt or pullover, jeans and a black ski mask.
The FBI said Friday that the robber appeared to have tactical training.
Anyone with information about the robbery is asked to call the Apex Police Department at 919-362-8661.