(LOS ANGELES) --
Two teenagers were shot in a classroom at a Los Angeles middle school Thursday morning, sending children running, officials said.
A girl believed to be 12 years old is a person of interest in the shooting and is in custody, officials said.
A 15-year-old boy was shot in the head and is in critical but stable condition, while a 15-year-old girl was shot in the wrist and is in fair condition, the Los Angeles Fire Department said.
No suspects are outstanding and the Salvador B. Castro Middle School has been declared safe, the Los Angeles Police Department said.
One parent told ABC Los Angeles station KABC-TV that the shooting took place next to her son's classroom.
"He was in tears, but I'm so thankful he picked up the phone," she said of her call to him.
Three others -- ages 11, 12 and 30 -- suffered minor injuries but were not shot, officials said.
The person of interest was taken to an LAPD station, police said. A gun was recovered, police added.
The motive is unknown, police said.
While how the gun was obtained is under investigation, L.A. city attorney Mike Feuer said this is a "call to action" for every adult who has a gun.
"You must store it safely and keep it out of access for any child to reach," Feuer said
The shooting was reported at 8:53 a.m. local time.
The school is now on lockdown, but officials said the normal school day will continue. The middle school is located on the Belmont High School campus and has about 365 students in grades six through eight.
"Our thoughts and prayers are with the Salvador Castro Middle School community," the Los Angeles Unified School District tweeted.
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