Police are seeking information after fireworks caused a fire on the Smoky Bay jetty on the weekend.
Police and emergency services were called to the jetty just before 7am on Saturday after reports it was on fire.
A local CFS crew extinguished the fire, which caused damage to the wooden jetty boards.
Police investigating the incident have established fireworks let off on Friday at about 11.30pm were the cause, with remnants of the fireworks found nearby.
Police are seeking information on persons seen near the jetty on Friday letting off fireworks.
A dark coloured utility, believed to be a Toyota Hilux with a canopy on the back, was seen to drive on the beach towards the jetty and a person from the vehicle let off a firework on the beach and then parked in the jetty carpark, meeting with people in a white dual cab with an awning and a tray on the rear, with a tool box directly behind the cab.
Two or three people were then seen to walk up the jetty, then shortly after a firework exploded and a male described as a thin build of about 175 centimetres, wearing dark clothing, was seen running from the jetty to one of the vehicles.
Both vehicles drove off quietly with the dark coloured Hilux driving back on to the beach and the white Toyota Hilux via the road.
Anybody with information on the fire or the vehicles seen in the area on Friday is asked to call Crime Stoppers on 1800 333 000 or online at crimestopperssa.com.au.