Reports of creepy clowns carrying knives and other weapons have been scaring people in the California city of Bakersfield for the past week, police said Sunday.

In the latest incident, a person telephoned the Bakersfield Police Department on Saturday night, reporting a clown armed with a firearm, said watch commander Lt. Jason Matson.

“We’ve been having sightings all over the city,” Matson said. “They range from anywhere from a guy carrying a gun to a guy carrying a knife running up to houses.”

The Bakersfield Californian newspaper reported earlier in the week that at least some of the reports were hoaxes. Matson said he did not know whether the incidents were pranks.

At least one of the reports was not a hoax: Police arrested a teen Friday who had dressed up as a clown and was chasing children on the west side of town, Matson said. The juvenile, whose name was not released, said he was doing it to perpetrate a hoax he had seen online.

He was arrested on suspicion of annoying a minor and booked into the Kern County Juvenile Hall, Bakersfield police said in a news release.

A child who had been chased “was clearly scared,” the release said.