Police are hunting for a naked man who approached a school student, allegedly performed an indecent act, then ran away.
The suspect approached the student at the Railway Reserve in Stoke, Nelson but was also seen at other parks in the area.
The man police are hunting was described as Caucasian, with a "fat stomach" in his 30s or 40s who had "salt and pepper coloured hair" and a goatee beard. He was described as tall and was recently wearing knee-length shorts and a grey top.
Police believe he'd frequented Tahunanui touch fields and the Railway Reserve behind Broadgreen School as recently as yesterday.
The man who allegedly performed the lewd act was considered a risk to the community, Detective Sergeant Ian Langridge said.