Camper van blows up in 'intentional act' on Christmas morning in Nashville

A parked camper van exploded in the US city of Nashville, Tennessee, early on Christmas morning, injuring three people and knocking out communications systems across the state.

Possible human remains were later found near the blast site, US media report.

Police believe the powerful blast was caused deliberately.

Officers responding to reports of gunshots just before 06:00 (12:00 GMT) found a camper van broadcasting a warning message to leave the area.

The van exploded a few minutes later.

A police officer was knocked off the feet by the force of the blast, officials said.

Police have now released this image of the van - described by Nashville police as a recreational vehicle (RV) - arriving at the scene early on Frida