A train derailment and the resulting large fire prompted an evacuation order in an Ohio village.
The blaze, near the Pennsylvania state line, covered the area in billows of smoke which were illuminated orange by the flames below.
About 50 rail cars derailed in East Palestine in the incident.
The train was carrying a variety of freight from Madison, Illinois, to Conway, Pennsylvania, rail operator Norfolk Southern said.
There was no immediate information about what caused the derailment. No injuries were reported.
Local officials notified residents that an evacuation order remained in place for people within a mile of the scene.
A high school and community centre were opened to shelter dozens of people, while residents beyond that radius were urged to stay inside.
The few dozen residents sheltering at the high school included Ann McAnlis, who said a neighbour had texted her about the crash.
“She took a picture of the glow in the sky from the front porch,” Ms McAnlis said. “That’s when I knew how substantial this was.”
Mayor Trent Conaway told reporters that firefighters from three states responded due to the location of the derailment about 51 miles north-west of Pittsburgh and within 20 miles of the tip of West Virginia’s Northern Panhandle.
Freezing temperatures complicated the response as trucks pumping water froze, Mr Conaway said.
Hazmat crews also responded to the scene to determine whether hazardous materials were involved, he said.
Norfolk Southern said it has personnel on-site co-ordinating with emergency responders.
The fire created so much smoke that meteorologists from the region said it was visible on weather radar.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here