SLIPPERY ROCK — State police are looking for two suspects in a Monday night robbery that left a convenience store clerk injured.

The robbers, both white men, made off with an undisclosed amount of money in the holdup about 8:45 p.m. at the BP Service Station on North Main Street in the borough, police said.

One of the robbers clobbered the clerk in the head with an unknown object, possibly a pipe.

The clerk, a 23-year-old Butler man, was treated at Grove City Medical Center for a head injury. His condition was not known this morning.

Police described both robbers as being in their mid-20s, between 5 feet, 10 inches and 6 feet tall, and with thin builds.

They wore dark boots and pants, and black zip-up hooded sweatshirts and red bandannas.

The clerk was alone in the store when the robbers walked in and attacked him, said store manager Joshua Magle.

The suspects took cash from the money drawer at the front counter and left the store.

“Just as they were running out the store,” Magle said, “a customer was coming in.”

Witnesses told police that the robbers drove away in an unidentified vehicle.

Magle said the store closed for about an hour after the robbery.

Anyone with information about the case is asked to call police at 727-284-8100.