OMAHA, Neb. (AP) — Omaha police are investigating the robbery of a pizza restaurant and the assault of an employee.

Police say the robbery of a Little Caesars pizza restaurant in north Omaha happened around 9 p.m. Tuesday.

Police were alerted when an employee ran from the back door of the store to a nearby restaurant to call 911.

The employee told police that two men with masks came into the store. Three employees were inside at the time, and one was assaulted by the robbers.

That employee was taken to an Omaha hospital for treatment.

Police say the robbers got away with an undisclosed amount of money.