A man is seriously ill in hospital at York District Hospital in an incident thought to be connected to the death of a 16-year-old girl from a suspected drugs overdose.
The police have issued a safety warning.
The yellow/white paste involved in this particular case is undergoing tests to determine exactly what it contains, although amphetamine is believed to be involved.
Until this is confirmed, people are strongly urged not to risk taking substances matching this description or of a similar nature.
One girl has already died and a young man is in a serious but stable condition at hospital, so the potential dangers are very real."
More top news
42-year-old Barry Solomon was found dead at an address in Kemble Square on Saturday night.
The Red Arrows have taken to the skies across the county today as one of the final training exercises in the UK before they head to Greece
Defender Matthew Bates is in charge for the final two games for Hartlepool to try and halt their slide out of the Football League