They were initially alerted by a parent, whose son was offered drugs in the park.
Sergeant Paul Ryan of CID confirmed that they were looking into the claims. The police already patrol the area, and are involved with community sports activities at the park to keep it a safe place for children.
Sgt Ryan said: “The States of Jersey Police have been made aware of possible supply of New Psychoactive Substances (NPS drugs) sometimes misleadingly called ‘legal highs,’ in and around the area of the Millennium Town Park.
“NPS drugs are sold under varying different names, one recently reportedly referred to as suicide pack. The Police continue to gather information and intelligence in relation to the supply of NPS drugs as they often contain illegal substances.
“Officers have also and will continue to regularly patrol the area and would ask anyone with any information to report it directly to them or anonymously though crime stoppers on 0800 555 111.
“A multi-agency approach is being taken in relation to the supply of NPS drugs and the prevention of suicide.”
The Island’s Youth Service and Freedom Church run sports sessions in the park every Friday and Saturday night with the help of the police, in a bid to keep youngsters in town out of trouble at the weekend.
NPS drugs, or former “legal highs”, are synthetic drugs designed to mimic the effects of illegal drugs like ecstasy, amphetamines or cannabis. Although they used to be legal, updates to the Misuse of Drugs Law means that most of them are formally classed as Class B drugs, which means that possession of them is a crime punishable by up to five years in prison, and supplying them carries a maximum prison sentence of 14 years.