A man robbed the US Bank at 367 Merchant St. this afternoon, Vacaville police said.The suspect gave the teller a note demanding cash around 2:10 p.m. and left with an unknown amount of cash, Sgt. Denise Quatman said.Police searched the area but did not locate the suspect. The suspect has dark skin and is approximately 20 to 25 years old. He was wearing a hat and blue coveralls and wore two different sets of glasses on his head,Quatman said.The FBI is assisting with the investigation and anyone with information is asked to call police. Please call the Fugitive Watch hot line at 1-800-9-CAUGHT (1-800-922-8448) or text us at 408-355-0999 if you have any information.