NEW LONDON, Conn. (AP) Health officials are warning the public about a particularly lethal supply of heroin being sold in New London after seeing an ``unprecedented'' number of overdoses in one day.

The Day reports eight people were treated for heroin overdoses yesterday and a ninth has died.

Doctor Deirdre Cronin, of Lawrence and Memorial Hospital, says three overdose patients were treated on Wednesday. At least four of the victims are believed to be from New London and one from Waterford.

Cronin says there is a supply of heroin being sold that's more potent or mixed with another drug. She says the victims were all addicts using their ``regular amount.''

She says city police have been working to figure out who's selling the drug and where it's being sold.