Authorities are investigating an attempted bank robbery in El Centro.

El Centro police responded to the Wells Fargo Bank at 12th and Main Streets shortly after 5:00 p.m. Friday after an armed robbery alarm was activated. Responding officers established a perimeter around the bank and were able to determine that the robber had fled the bank empty-handed. Investigators determined that the suspect had passed a note to a teller demanding money but left the bank with out any loot. The robber was described as wearing a white shirt and black shorts and a black hat. The incident remains under investigation by El Centro Police and the Federal Bureau of Investigation.