One person was gunned down Friday morning shooting at Highland High School in Palmdale, said the Los Angeles County Sheriff's Department on Twitter.
The injured person is in a stable condition in a hospital, the news said.  The detained suspect, as stated in the tweet, is a male teenager, and officers have confiscated a firearm
[Previous story, published at 12:16 p.m. ET]
(CNN) – A suspect is in custody after the authorities reported shooting at a Southern California high school Friday morning, sources said.
Authorities were called to Highland High School in Palmdale at about 7:05 am PT, Los Angeles County Sheriffs MP Charles Moore said:
Details of whether anyone was injured were not immediately available. Witnesses outside the school reported seeing shots and seeing students running out of the building.
The suspect, a man, was arrested near a Vons grocery store in Palmdale, a Los Angeles County fire department official said
School District Superintendent Raul Maldonado confirmed in a statement that there had been an active shooter on campus ,
Ricky Munoz, 23, says he dropped off his two younger brothers and a friend at high school shortly after 7 pm
"About a minute later, I received a call from them saying shots were fired" and they wanted to be picked up, Munoz said.
One of the brothers, 1
Students barricaded themselves in the classroom, says Mother
Nadine Luke told CNN that her 18-year-old daughter had called her screaming after hearing shots at school. The teenager was in the reserve officer class and said the students would place sofas and desks in front of the door and windows to barricade, Luke said.
"All the authorities are telling us that they are working on the situation," Luke said. "The only thing I want now is to have my daughter here."
Lydia Gilbert, a Highland junior, said her mother dropped her when a student approached her and warned her there was a shootout.
Lydia said she heard two shots before she and her mother drove away.
"I should go to school earlier than I, but I was late," she said. A shootout in school was "actually one of my biggest fears".
Highland high-school student Katharina Smith, 16, said she drove to school when she saw "a ton of police running to school".
"There were a few children from the school and security and sheriff told people to go home," she said.
A student's mother, Ana Salazar, told CNN members KCAL and KCBS that her son had written to her that a shootout had happened.
"I thought he was joking and I'm like," Do not mess around, that's not funny, "Salazar said." And he's like, "No mom, for reals, I locked myself in I heard it on the other side of the school. There was a shot. And I'm now locked in one of the buildings. "" 
"Please stay clear of campus #
The headmaster posted a message on Twitter in which he told people Prompted to stay away from the campus.
"Law enforcement agencies are working to assess the situation" Message from Director Chris Grado says, "Please stay away from the campus. Will you update as soon as you have more information. "
At least three nearby schools – David G. Millen Intermediate, Cottonwood Elementary and Ocotillo Elementary – were on block, staff there said] The Office for Alcohol, Tobacco, Firearms and Explosives said it responded to a shoot-out at Highland High School, according to the official Twitter account.
Palmdale, a city of about 150,000, is located in Los Angeles County, about 40 miles miles north of downtown of Los Angeles
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CNN's Hollie Silverman, Gianluca Mezzofiore, Keith Allen, Dakin Andone and Deanna Hackney contributed to this report.