A North Dakota Highway patrolman and K-9 respond to a reported robbery at U.S. Bank on E. Bismarck Expressway on Tuesday morning. 

Bismarck police are following up on tips and reviewing video in their efforts to apprehend the man who robbed an East Expressway bank on Tuesday.

Bismarck police officer Lynn Wanner said a few tips have been received about the robbery at U.S. Bank, which was reported at 9:17 a.m. A male suspect — still at large — made off with an undisclosed amount of cash after saying "this is a robbery" to a bank teller, Lt. Luke Gardiner said.

No weapon was displayed. The man fled the bank on foot. There were at least three bank tellers and one customer were in the bank at the time, Gardiner said.

Police released a photo of the man on Tuesday but want to review video to see if it contains more or better images. The video also might reveal information about how he moves or walks, Wanner said.

The man is described as being about 6 feet, 1 inch tall with a dark beard. He was carrying a respirator mask and wore black glasses, gray pants and a black shirt during the robbery.

Anyone with information can call 701-223-1212 or give an anonymous tip by calling 411.

U.S. Bank spokeswoman Heather Draper said tellers are trained for such situations and the teller who was approached by the robber followed that training. Bank staff followed post-robbery protocol after the incident, she said, and the bank opened at 9 a.m. today.

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Reach Travis Svihovec at 701-250-8260 or travis.svihovec@bismarcktribune.com.