At least three people, including the suspect, have died and seven others are injured after a shooting at a high school in St Louis, Missouri.
The gunman entered Central Visual & Performing Arts High School shortly after 09:00 local time (13:00 GMT) on Monday.
The doors of the school building were locked and it was not immediately clear how the suspect entered.
Witnesses say lives were saved after the gunman’s weapon jammed mid-attack.
St Louis Public Schools say police “quickly stopped” the gunman.
His motive for the attack at the school of about 400 students is unclear.A teenage girl was pronounced dead inside the school, while one woman died in hospital, police told local media.
The seven injured – three girls and four boys – all had non-life-threatening injuries, according to local media.
Students were running out of the school when officers arrived and said the attacker had a “long gun”, according to the city’s police commissioner Michael Sack.
He said seven security workers on site had acted quickly to notify other staff and contact police.