LOS ANGELES: At least four people were injured in a shooting at a high school north of Los Angeles on Thursday, triggering a police hunt for the suspect who was later taken into custody.

Police and ambulances swarmed the area around Saugus High School in Santa Clarita, 65 kilometres north of Los Angeles, after the early morning shooting sent panicked children running from the area.

`Update regarding the shooting at #SaugusHigh, suspect is in custody and being treated at a local hospital,` tweeted Los Angeles Country Sheriff Alex Villanueva.

The suspect was described as a male Asian. Local media reports said he was 15 years old.

Officials at the nearby Henry Mayo Hospital in Valencia said they were treating a total of fourpatients from the high school three of whom were in critical condition.

Police spokesman Bob Boese, speaking on the local NBC news channel, cautioned that it was not clear if all victims had been located. He said one weapon had sofarbeenrecovered.

The Santa Clarita Valley Sherif f`s department had earlier tweeted that it believed there was only one suspect involved.

A White House spokesman said President Donald Trump is `monitoring the ongoing reports.

Aerial video from the local NBC affiliate showed students withhandsraisedbeingescorted by officers from the building, and led to a nearby church, as others stood outside the perimeter on their cell phones.

Denzel Abesamis, a student at the school, told the Los AngelesTimes he was arriving at campus when he saw classmates fleeing the scene. He called a friend who was hiding in a classroom with five other students.

`I`ve always been worried about something like this would happen since it was my actual school,` he said, adding that the school had been locked down due to reports of a threat a few years earlier.

`Saugus has emphasized the importance of making sure to always be cautious of anything that may happen like an active shooter,` he said.

California senator Kamala Harris, a Democratic candidate for the 2020 election, said she was `heartbroken and praying for Santa Clarita`. `Our children and communities are being terrorized. We can`t accept this, she tweeted.-AFP