London ( CNN ) -- Police in northern England were called to investigate this week after children who were out trick-or-treating for Halloween were given small snap-top bags of what turned out to be cocaine . The bags , containing white powder , were given to police after they were handed to the children Wednesday evening in the small town of Royton , Greater Manchester Police said in a statement . Testing confirmed that they contained cocaine , and a man was arrested . Donald Junior Green , 23 , has been charged with drug possession and is due before a magistrates ' court in Oldham , near Manchester , on Friday . A 21-year-old woman was arrested on suspicion of drug possession and was later released without charge , police said . Police Superintendent Catherine Hankinson said : `` The parents and police acted quickly when this report was made , in the interests of public safety . `` We understand this to be an isolated incident . ''
Police were alerted after children were given small bags of white powder . They were out trick-or-treating in the town of Royton , near Manchester . A 23-year-old man is due in court Friday charged with drug offenses . `` We understand this to be an isolated incident , '' police superintendent says .