BOZEMAN, Mont. -

The Bozeman Police Department released images of the suspect in a weekend robbery of the Domino's on North 7th.

According to authorities a man walked in to the Domino's wearing a clown mask just before 11:00 p.m. on Sunday night.  They say he was carrying a semi-automatic handgun and demanded cash.

Police say the robber fired one shot as he made off with a small amount of money. No one was injured.

Witnesses say the suspect was last seen headed south from the Domino's.  Detectives say there have been no other significant developments with the investigation at this time.

"Luckily, we haven't has an armed robbery in Bozeman in almost a year so, obviously, we're concerned and that's why we're working as hard as we can to solve this crime. I'm not going to say that it's not going to happen again but, hopefully, it doesn't," says Bozeman Police Detective Scott McCormick.

Evidence has been sent to the state crime lab and McCormick tells us officers are doing more patrol checks.

They say they are following several leads and tell us this case is their top priority. Detectives tell us they've had four detectives on the robbery since it happened, Sunday night.

If you have any information you are urged to call the Bozeman Police at 406-582-2010 or Headwaters Crime Stoppers at 406-586-1131.