A female nursery worker has been arrested in connection with an alleged sexual assault of a child in her care.
The 32-year-old woman was arrested at a nursery in south Leeds on Friday. She was bailed while inquiries continue.
West Yorkshire Police said officers from its child and public protection unit were investigating the alleged assault.
A spokesman said the allegation was an "isolated incident" and inquiries were in their early stages.
A spokesman for Leeds City Council said: "We are aware of this investigation and are providing the police with all requested assistance.
"Parents and carers who use the nursery have been notified but can contact the council's children's services team on 0113 395 0247 to discuss, in confidence, any queries."