Four people were killed when an employee opened fire in a bank in Louisville, Kentucky, and livestreamed the attack on Instagram.
Police say the victims were aged between 40 and 64. Among nine others injured was a rookie police officer who graduated into the force two weeks ago.
The victims have all been identified:
- Thomas Elliot, 63
- James Tutt, 64
- Joshua Barrick, 40
- Julianna Farmer, 45
The officer who was struck in the head was identified as Louisville Metro police officer Nickolas Wilt, 26.
The officer was struck in the head and is still critical after brain surgery.
Police responded within three minutes, and fatally shot the attacker in an exchange of gunfire.
The gunman was identified as Connor Sturgeon, an employee at Old National Bank, according to interim Louisville Metro Police Chief Jacquelyn Gwinn-Villaroel. He was killed by police after a shootout with authorities.
The shooting took place at the Old National Bank in the city centre at about 08:30 local time (12:30 GMT).