Gardaí have arrested a 31-year-old man in Dublin city centre in relation to an alleged sexual assault on a woman with special needs last Wednesday.

The incident happened when the woman in her 20s got separated from a family member on the South Circular Road on Wednesday afternoon.

Detectives believe the victim was taken to a house in the area where an assault took place.

A man arrested in connection with the incident was arrested by Gardaí this morning.

He's being held at Kevin Street Garda station under section 4 of the Criminal Justice Act.