Two men aged 23 were arrested on suspicion of being concerned in the supply of a controlled drug and have been bailed.
Six men aged 19 to 22 were taken to hospital overnight from a house at Ripon Gardens in Newcastle. One of the men is critically ill. Police believe the six had taken a hallucinogenic drug.
More top news
Crimestoppers has offered £10,000 for information in connection with the murder of Robert Hutchinson who disappeared three years ago.
A look ahead at the forecast for the Tyne Tees region - and things are about to turn cooler.
A Durham sixth form student has told ITV News Tyne Tees of the pain she feels for victims after she survived the Manchester terror attack.