Starion Financial Bank in Mandan has offered a reward for information about the Friday night robbery of the bank.

Mandan Police Deputy Chief Paul Leingang said the bank has offered a $1,000 reward for information leading to the arrest and conviction of the person or people responsible

A man armed with a handgun entered the bank, located at 109 First Street N.W., around 5 p.m. Friday and demanded money. Tellers complied and gave the man an undisclosed amount of cash, which he put into a white plastic grocery bag. He left through the bank's north entrance and headed north.

Officers from the Mandan Police Department and Morton County Sheriff's Department responded to the alarm call in less than a minute but did not find anyone in the area matching the robber's description.

The man is described as about six feet tall, weighing between 200 and 250 pounds. He also was wearing a zipped-up jacket with a hood attached to it or a hooded sweatshirt underneath the jacket, a black ski mask, lighter-colored blue jeans and dark-colored boots and gloves.

Police also are looking for information about a car seen in the area of the bank about 45 minutes prior to the robbery. A man in his early 30s was seen driving a 2003 to 2005, light gold or tan-colored Chevrolet Impala slowly by the bank. Police do not know if the car or the driver was involved in the robbery, but they are looking for information to narrow down leads. The first two letters of the Impala's license plate are "HS," police said.

The case is being investigated by the Mandan Police Department and the Federal Bureau of Investigation.

Anyone with information about this case is encouraged to call the Mandan Police Department at 667-3250.

Leingang, a 28-year Mandan Police Department employee, said he could not recall another bank robbery in Mandan. A quick search of the department's computer system, which goes back to 1994, also did not turn up any information about previous bank robberies in the city, he said.

The last bank robbery in Bismarck was in 2004, when a man walked into Kirkwood Bank and Trust with a knife and demanded money. Frank Bohe, of Bismarck, was found not guilty by reason of insanity in a federal bench trial.

(Reach reporter Jenny Michael at 250-8225 or jenny.michael@;bismarcktribune.com.)