Salt Lake police were kept hopping Sunday night with four armed robberies - three at businesses and one at a private residence.

Police Lt. Tom Brown said the first robbery occurred about 5:20 p.m. when a man entered the Arctic Circle restaurant at 1230 W. Sixth North, laid a gun on the counter and demanded money from the cash register. The man then fled east on foot.At 6:30 p.m., police received reports of an armed robbery at Smith's Gas and Video, 420 E. First Ave. A man entered the store, displayed a gun and demanded money from the store clerk. The robber fled on foot.

Brown said the robber in both incidents was a white male in his early 20s and wearing a nylon stocking over his head. The 6-foot-tall man had dark hair, a moustache and a slender build. In both instances, the robber wore denim jackets and trousers, and high-top sneakers. More than $100 was taken in each robbery, Brown said.

"It could well be the same person," Brown said.

The third robbery occurred about 8:25 p.m. at the La Parisien Restaurant, 417 S. Third East. A white male about 5 feet 8 inches to 6 feet tall with short blond hair was seen loitering in front of the restaurant. The man entered the restaurant lobby and used a pay telephone to contact the employee at the cash register. The employee told police the robber displayed a gun she could see through a glass partition.

The man threatened her and ordered her to empty the cash register and bring him the money. He fled on foot with several hundred dollars, Brown said. The man wore a black leather jacket, denim pants and a black scarf around his neck.

The residential robbery occurred in the Third South block of Eighth East about 8:30 p.m. A 58-year-old man was confronted by a 17-year-old acquaintance who displayed a large chain and demanded money. When the victim refused, the youth struck the man in the head with the chain and took money from the victim's wallet before fleeing, said Brown.

No arrests have been made in any of the robberies.