A teenager armed with a black handgun held up Lomeli Communications at 303 E. Lake Ave. around 4:50 p.m. Tuesday, Watsonville police reported.
Police searched for the robber but he had not been arrested late Tuesday.
The clerk told officers the robber brandished the gun and took cash. He was described at 17 or 18 years old and Latino. He was wearing a baseball cap, hoodie sweatshirt and blue jeans, police said.
No one was hurt, police said.
Detectives ask that anyone with information about the robbery call the Investigations Division at 768-3350 or the Crime Tipline at 768-3544.