LARAMIE, Wyo. (AP) — Police in Laramie say they arrested a Colorado man following an attempted bank robbery Tuesday morning.

According to a statement from the Laramie Police Department, a 23-year-old man from Fort Collins, Colo., approached a worker with a handgun in the parking lot of a Wells Fargo bank early Tuesday morning.

The bank employee was able to lock the bank door and called police. The man was arrested soon afterward after witnesses told police they had seen him changing his clothing and discarding evidence.

The FBI is assisting with the investigation and prosecutors are reviewing the matter.