A fire has ripped through Shuri Castle, a World Heritage Site in Okinawa, Japan, destroying the main building.

Firefighters have been battling the flames since early on Thursday. No injuries have been reported so far.

The castle, built about 500 years ago in the Ryukyu Dynasty, was designated Japan's national treasure in 1933.

It was previously destroyed in a fire during World War Two, and was rebuilt.

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