Clothes and equipment owned by a Mid Sussex operatic society were destroyed in a blaze.
The fire broke out at a wooden hut at Tilgate Recreation Centre in Crawley.
Firefighters arrived at 2.30am yesterday and tackled 30ft flames shooting from the building.
They managed to control the blaze at Hut 22 and stayed at the scene throughout the night to ensure it did not reignite.
A spokeswoman for Crawley Borough Council said the hut was used by the Crawley Operatic Society.
Firefighter Chris Diver said clothes rails were found in the debris this morning. Sussex Police are investigating the cause of the fire.
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