SEATTLE -- Three banks were held up on Monday in King County leading FBI officials to believe that a repeat bank robber is on the loose, according to KIRO 7 Eyewitness News.

Agents believe that the robbery of a Bank of America in the Georgetown neighborhood and the robbery of a US bank on Logan Avenue in Renton were done by the same person.

The FBI said the robber was frustrated when he went inside the Bank of America in Georgetown and realized that the bank had bulletproof "Bandit Barriers" that prevent robbers from getting at the tellers.

The robber demanded cash and the teller walked away leaving the assailant empty-handed.