Two people were killed and three more wounded in a school shooting in Los Angeles County Thursday.

The incident occurred at Saugus High School in Santa Clarita, 30 miles north of the city of Los Angeles.

Authorities say five people were wounded in the incident, which took place around 7:40 a.m. local time, 20 minutes before classes began.

One of the victim is in critical condition, officials at Henry Mayo Hospital said, while two students have been declared dead.

Police placed the school on lockdown and conducted a search for the gunman.

Authorities later reported that the gunman as in custody, and was wounded during the incident, after he shot himself in the head.

"Update regarding the shooting at #SaugusHigh, suspect is in custody and being treated at a local hospital," tweeted Sherrif Alex Villanueva.

The Santa Clarita Sherrif’s Office described the suspect was an Asian male wearing black clothing.

Witnesses say the gunman is a 16-year-old student.

Nearby elementary schools were also placed on lockdown following the shooting.

Prior to the suspect's capture, area residents were advised to remain indoors and to keep their doors locked.

"If you live in neighborhoods anywhere near Saugus High, PLEASE LOCK DOORS and stay inside. If you see suspect, male dark clothing, in backyards, etc. CALL 911," the sheriff's office tweeted.

"This is an active shooter situation. The suspect described to be a male Asian, black clothing is outstanding."

"We believe at this time that there is only one suspect but we are actively investigating and following all leads."