Part of Sheffield's iconic Park Hill flats was left damaged in an arson attack last night.
The blaze was started in a ground floor empty shop unit at the South Street complex at about 7.10pm.
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Crews from Sheffield Central, Elm Lane and Barnsley spent more than two hours tackling the fire.
Firefighters had to check accommodation above the shop unit to see if anyone was inside as a precaution but the site was empty.
A fire service spokesperson confirmed the blaze had been started deliberately.
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Elsewhere last night, arsonists set fire to a patch of grassland in Dearne Lane, Manvers, at 7.35pm.
Firefighters from Doncaster Central Fire Station were called out to deal with the fire.
A pile of litter was set alight in Royston Lane, Royston, at 9.50pm.
Firefighters from Cudworth Fire Station dealt with the blaze.
A caravan went up in flames in Storrs Bridge Lane, Loxley, at 10pm.
Crews from Elm Lane and Rivelin fire stations extinguished the blaze.
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A fire service spokesperson said it was started deliberately.
A Ford Fiesta car went up in flames in Foxhill Avenue, Burngreave, at 5am this morning.
Rivelin firefighters were called out to deal with the blaze, which had been started accidentally.