The Salt Lake County sheriff's office investigated a late-night armed robbery at restaurant Monday, a sheriff's spokesman said.

A man entered the restaurant at 5400 S. Redwood about 10:45 p.m., displayed a silver handgun to a clerk and demanded money, taking an undetermined amount of cash, the spokesman said.

Witnesses said the gunmen fled south on Redwood Road in a late-model Chevy with an accomplice, he said.