SCAPPOOSE, Ore. – A man who robbed a US Bank in Scappoose at knifepoint Tuesday morning is wanted for four additional bank robberies, the FBI says.

Tuesday's robbery occurred in the US Bank branch at 52313 Columbia River Hwy.

Police said a Hispanic man armed with a knife jumped over the teller counter and threatened employees. The man got away with an undisclosed amount of cash. There were no customers inside the bank, just employees.

No one was hurt.

Photos: Scappoose bank robbery

Scappoose Police Chief Norman Miller said all schools were put in lockdown as a precaution, including Scappoose Middle School, which is across the street from the bank. All students were safe.

The FBI says the suspect is a serial bank robber known as the "Froggy Robber." He is described as a Hispanic man who is between 5'3'' and 5'5'', and 160 pounds. He was wearing a blue hoodie and blue pants and black shoes.

Anyone who sees the suspect is asked to call 911.

The suspect is wanted for the following bank robberies, according to the FBI:

October 19, 2017 - A man robbed the Columbia Bank at 1455 Southeast 1st Avenue in Canby. He approached the teller counter, jumped the counter, and threatened employees with a knife while taking the money from all of the teller drawers.

November 27, 2017 - A man entered the Albina Community Bank, located at 2002 NE Martin Luther King Jr Blvd. in Portland, and jumped over the teller counter. He robbed the tellers at knifepoint and ran away from the bank.

December 27, 2017 - A man robbed the Wells Fargo Bank at 8699 SW Main St. in Wilsonville. He jumped over the teller counter and robbed the tellers at knifepoint.

January 11, 2018 - A man jumped over the teller counter at the Wells Fargo Bank, located at 6785 Beaverton Hillsdale Hwy., and robbed the tellers at knifepoint. The suspect then fled on foot.