A military transport plane crashed in southern US state of Mississippi's Delta region on Monday, killing at least 16 people on board, officials said.
The KC-130 military refueling tanker crashed about 85 miles (135 kilometers) north of state capital Jackson.
A helicopter was searching for others in the dark around the crash site in a soybean field on Monday, more than five hours after the KC-130 refueling tanker spiraled to the ground into a soybean field.
The crash was reported about 4 p.m. local time and debris from the plane was scattered in a radius of about 5 miles (8 kilometers). An intense fire fed by jet fuel hampered firefighters causing them to turn to unmanned devices in an attempt to control the flames.
There were several high-intensity explosions too.
Aerial pictures taken by a local showed the skeleton of the plane burning fiercely, producing plumes of black smoke visible for miles across the flat landscape of the delta.
The incident was a "tragedy", Mississippi Governor Phil Bryant said in a statement on social media site Facebook, but offered no details.