Girl, 12, suspect in US middle school shooting

A 12-year-old girl is responsible for the latest US school shooting after two 15-year-olds were shot in a middle school classroom this morning. 

Television news footage showed officers leading a girl with dark hair away in handcuffs following the shooting on Thursday (local time) in a classroom at Castro Middle School.

A 15-year-old boy hit in the head was transported to a trauma center in critical but stable condition, according to fire department spokesman Erik Scott. A 15-year-old girl with a gunshot wound to the wrist was taken to a hospital in fair condition.

Three other people, ranging in age from 11 to 30, suffered minor cuts and scrapes.

Police cars blocked off an intersection near the school and parents gathered at the street corner, talking on their phones and awaiting word on their children.

Gloria Echeverria was waiting outside a line of police tape preventing people from approaching the school, waiting for news about her 13-year-old son.

"I'm just hoping it has nothing to do with him," she said. "I'm just scared for all the kids — school is supposed to be a safe place for them, and apparently it's not."

Steve Zipperman, chief of the Los Angeles Unified School District police force, said the school's campus remained on lockdown later in the morning but had been declared safe.

"We will attend to the needs of these students who witnessed this very carefully, with the understanding this is very traumatic," Zipperman said. "We have our school mental health folks that are here to support the needs of the students."

Related: Florida school shooting: Police arrest Nikolaus Cruz who is a previous student.