document: Police were first called to St James Boulevard in Newcastle just after midnight due to concerns for a man, 21, and an 18-year-old woman.
  Her condition is described as potentially life-threatening.
  An hour later, another couple, both 18, also had to be taken to hospital after becoming ill in the city centre.
  Northumbria Police said a quantity of drugs, believed to be ecstasy, had been seized and inquiries were ongoing.
  Det Inst Sally MacDonald said: "Taking illegal drugs is incredibly dangerous and the fact four people have been taken ill in just one evening is particularly worrying."
summary: Four people had to be treated in hospital after taking what is thought to be ecstasy.