Early on Christmas morning a massive explosion has rocked the downtown core of the city of Nashville in the US state of Tennessee.
Police there are calling it an 'intentional act', and say the blast was linked to a recreational vehicle.
Three people have been injured but no fatalities have been reported.
Several rows of buildings have been damaged.

Al Jazeera’s Shihab Rattansi joins us live from Washington, DC for the latest updates.

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