An "intentional" explosion linked to a motorhome has rocked the city of Nashville in the US.
It happened at 6.30am in an area of central Nashville packed with bars, restaurants and shops, police said.
The blast sent shattered glass and debris flying through the air as black smoke and flames billowed from the vehicle.
A loud boom was heard and buildings shook, sending many people into a panic.
Metro Nashville Police believe the explosion was an "intentional act", although the motive is not yet known.
There have so far been no significant injuries reported but three people have been taken to hospital.
Emergency crews have been at the scene, as well as state and federal authorities.
An investigation has been launched by federal authorities, including the FBI.
"The explosion was significant, as you can see… the police department, its federal partners - the FBI and ATF - are conducting a large-scale investigation to this point," said Don Aaron, Nashville police spokesperson.
