Two students have been killed and three others injured by a gunman who opened fire at a secondary school in California, officials say.
The shooting took place at the Saugus High School in Santa Clarita, north of Los Angeles, minutes before the school day was due to begin.
A 16-year-old male suspect, who was also injured, was taken into custody.
Many US schools have implemented active shooter drills in recent years after fatal attacks around the country.
What do we know about the shooting?
The shooting was first reported at 07:38 local time (15:38 GMT), LA county sheriff Alex Villanueva told a press conference. "Within seconds we received multiple [emergency] calls," he said, adding that the first police units had arrived at the scene within two minutes.
Police found six people suffering from gunshot wounds and transferred them to local hospitals – and the suspect was later identified as one of those injured, Mr Villanueva said.
Two victims – a 16-year-old girl and a 14-year-old boy – died of their injuries, police said. The other victims were two girls aged 15 and 14, and a 14-year-old boy.
The suspect was "identified as a 16-year-old male whose birthday was today", firearms expert Captain Kent Weneger said. He was named by US media as Nathaniel Berhow.
According to witnesses, the suspect took a gun out of his backpack and shot the five students, before turning the gun on himself. The weapon recovered was an emptied .45 calibre semi-automatic pistol, Mr Weneger added. Police said they had located the suspect's home and would search it for evidence.
What was it like for other students?
Saugus High School and other neighbouring schools were placed on lockdown during the shooting. The lockdown was lifted about three hours later.
LA undersheriff Tim Murakami wrote on Twitter that police would be interviewing all Saugus High School students before releasing them to their parents. He added that they would investigate rumours that the suspect had posted threats on social media.
Question was asked -Why every student? They could either be a witness,
provide important information about the shooter or a possible motive
— Undersheriff Tim Murakami (@LASDMurakami) November 14, 2019
End of Twitter post by @LASDMurakami
One student told NBC she was doing her homework when people started running. "I was really, really scared. I was shaking," she said.
Another student, named as Azalea, told CBS she and her classmates had barricaded the classroom door with chairs. "It was just really scary, having everybodRead More – Source