Police have released CCTV footage in an appeal for information about two suspicious fires at a building linked to corrupt former MP Eddie Obeid.

The Bellevue function centre in Bankstown in Sydney's south-west caught fire twice in eight days over the 2016/17 Christmas and new year holiday period.

Emergency services were called to a fire at the unoccupied building on Restwell Street at 4.45am on December 26.

They extinguished the blaze but the building was left with significant fire damage.