Police have arrested a man accused of raping an Irish woman who volunteered at a children's charity in the Indian city of Kolkata.

A police official in the eastern city said the local businessman who was arrested will be produced in court later Wednesday.

The official could not be named because he wasn't authorized to speak to reporters.

He said the man met the woman at a party she hosted to celebrate her 21st birthday late Friday. The official said the woman went to the man's house where she drank a cup of tea, passed out and was raped.

Few other details were immediately available.

The reported assault comes as other attacks against women have heightened concerns about sexual violence in India.