'Sleeper' craze: Greater Manchester Police warns of death
Police have warned parents to be aware of a new craze which sees children suffocating each other until they lose consciousness.
Greater Manchester Police said a child was in hospital after falling victim to the potentially fatal "Sleeper" prank.
The force posted the warning on Facebook, alerting parents to the "extremely dangerous" practice.
Officers said it involves children covering the mouths and noses of younger children until they pass out.
"Please advise every child you know and warn them of the dangers," police said. "This could easily lead to [unconsciousness] or even death."