A huge explosion has sent “glass and steel” flying everywhere in the city of Nashville, Tennessee in the early hours of Christmas morning.
Multiple casualties have been reported and police say their could be more devices.
Special operations have told reporters that they have received information there could be additional devices in vehicles.
Roughly 30 people were evacuated from nearby apartments at around 5.30am today local time (11.30am GMT) and the bomb squad is on the scene, as well as police and fire crews.
Police said the incident was linked to a vehicle parked outside the Melting Pot restaurant and investigators said a motorhome was involved.
Nashville Fire radio traffic is reporting that the blast caused “heavy structural damage” and glass and steel to shatter “everywhere”.
The Nashville Fire Department said in a statement: “There is an incident involving an explosion. This is an active scene.
“Metro Nashville Police Department and Nashville Fire Department are on the scene.
“There are no additional details to provide at this time.”
The injured are said to have non-life threatening injuries.
Residents are reporting feeling the ground shake when the explosion happened.
American Singer-songwriter Cassadee Pope was one of those who felt the effects of the incident.
“Our house shook here in Nashville,” she tweeted.
“Just praying nobody was hurt.”
Nashville’s bus company WeGo is helping to move people out of harms way and giving them somewhere warm to go as temperatures fall to -7°c.
Images and videos taken in the area showed flames and smoke billowing into the sky which could also be seen from miles away.
Alarms inside several buildings were heard going off with water systems pouring into some buildings, many with structural damage and broken windows.