Police: "If you are in possession of this
substance do not use it."
A teenage boy believed to have smoked a legal high has been arrested on suspicion of assaulting a baby.
Police said the 16-year-old was thought to have taken a substance called Salvia.
The baby suffered minor injuries when it was grabbed from a buggy and thrown to the ground, in Woodhorn Crescent in Newbiggin, Northumberland.
Another 16-year-old boy is in hospital after smoking the same substance, police said.
The teenager collapsed but is in a stable condition.
Superintendent Mick Paterson said: "Our advice is - just because it says 'legal' on the packet does not mean it is safe. These products are usually made from chemicals that can have a serious effect on your health.
"People appear to be suffering some particularly nasty side effects to this substance, Salvia, and we are concerned that there appears to be a quantity of it circulating in the Ashington area at this time.
"If you are in possession of this substance do not use it - and if you have taken it seek medical assistance at once."