4WD sought over bomb blast in Melb park

A homemade bomb is the likely cause of an explosion at a park in Melbourne's southeast last month.

A loud bang was heard at a reserve in Skye about 6am on August 29, which police believe came from a homemade device being detonated.

Anyone near the explosion is likely to have been peppered with PVC fragments or sustained flash burns or hearing damage.

Police have released CCTV footage of a 4WD they are trying to identify.