A 25-year-old man has been arrested on child abduction, abuse of position of trust and drug offences in Co Londonderry.
Police said the offences took place in the Magherafelt area in March this year.
He was released on bail and inquiries are ongoing.
The BBC has reported that the man was an residential social care worker and that several teenagers were in his care.
In a statement, health authorities in Northern Ireland have confirmed that as a result of information received, an agency worker’s contract has been terminated.