The PNC Bank at 7520 S. U.S. Highway 1 in St. Lucie County was robbed Monday afternoon, according to the sheriff's office.
The suspect walked in just after 4:30 and handed a note to a teller which said he was robbing the bank, investigators said.
He left in a northerly direction through the Publix shopping plaza, the sheriff's office said.
No weapon was seen.
Anyone with information is urged to call Detective Daniel Campbell at 772. 462. 3243 or Treasure Coast Crime Stoppers at 800.273. 8477.