Firefighters have been battling a blaze in southwestern Sydney threatening a historical building.

NSW Police noticed the fire at Whiteman’s Arcade in Camden at about 3.10am on Friday.

The two-storey structure, which is more than 100 years old, is used by several businesses, including a restaurant on the upper level.

Police set up a crime scene and emergency services say they don’t believe anyone was inside the building.

AAP

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