(CNN) A suspect is in custody after authorities responded to reports of shots fired and a man with a gun at a Southern California high school Friday morning, a Los Angeles County fire official said.
Authorities were called to Highland High School in Palmdale at about 7:05 a.m. PT, according to Los Angeles County Sheriff’s deputy Charles Moore.
The Palmdale Fire Department told CNN it had received reports of shots fired.
The suspect, a male, was apprehended near a Vons grocery store in Palmdale, the Los Angeles County fire official said. Details about whether anyone was injured weren’t immediately available.
Ricky Munoz, 23, says he dropped his two younger brothers and a friend off at the high school around the time it happened.
“About a minute later, I get a call from them saying there were gunshots” and they asked to be picked up, Munoz said.
One of the brothers, 16, told Munoz he heard one gunshot, and that students were running.
Highland High student Katharina Smith, 16, said she was driving to the school when she saw “a ton of police racing toward school.”
“There were some kids running from the school, and security and sheriff were telling people to go home,” she said.
The school’s principal posted a message on Twitter, urging people to stay away from the campus.
“Law enforcement is working to assess the situation,” the message from Principal Chris Grado says. “Please stay clear of campus. Will update as soon as have more information.”