The FBI and local police are looking for a suspect implicated in a string of six bank robberies in St. Paul that began last summer.

The FBI's Minneapolis division and the St. Paul Police Department are investigating a spree during which the suspect robbed some banks multiple times, sometimes within the same week.

"I think the most telling aspect to this bank robber is that he seems to have a preference to rob banks with which he is familiar," FBI spokesman Kyle Loven said Thursday.

Investigators described the suspect as a slim-built Asian male in his late 20s or early 30s, approximately 5-feet, 2 inches tall and weighing between 130 and 150 pounds.

The FBI released a pair of security images from the string of robberies, which began Aug. 28 at a TCF Bank at 459 Lexington Parkway North in St. Paul. The same man is suspected hitting a TCF Bank at 1988 Suburban Av. twice, on Nov. 23 and Nov. 27, and of later robberies a Bremer Bank at 427 North Snelling Av. on Dec. 28 and Jan. 28.

The FBI said he also attempted to rob a Lake Area Bank in Oak Park Heights on Jan. 28.

Loven said the man has threatened to use a weapon during the robberies but has so far not displayed one. "Anyone who enters a bank and threatens a weapon is a dangerous person," Loven said.

The FBI is asking anyone with information to call the agency at 763-569-8000 or St. Paul police at 651-266-5650

Stephen Montemayor • 612-673-1755

Twitter: @smontemayor