Six people, including a police officer, have been killed in a shoot-out in New Jersey.
The officer was investigating a murder in Jersey City when he approached two suspects, one of whom opened fire and shot him in the head, police sources told NBC News.
The two suspects then fled in a rental van and holed up in a grocery store where a gun battle broke out, according to reports.
Both suspects and three civilians were killed, NBC News said.
All schools in Jersey City were put on lockdown as heavy, sporadic gunfire was heard over an hour.
The officer who was killed was a 39-year-old father of five children, according to officials.
A second officer was wounded after being struck in the shoulder by gunfire, and two others were injured by shrapnel.
SWAT teams, state police and federal agents responded to the incident, with officers blocking off an area which includes a school, a kosher supermarket and a hair stylist.
Authorities have said the incident is not believed to be a terror attack
US President Donald Trump tweeted: “Just received a briefing on the horrific shootout that took place in Jersey City, NJ.
“Our thoughts & prayers are [with] the victims & their families during this very difficult & tragic time.
“We will continue to monitor the situation as we assist local & state officials on the ground.”