Four persons have been arrested in connection with a Rs 400 crore “fraud” online betting and gaming app allegedly linked to some Chinese nationals, the Enforcement Directorate (ED) said on Friday.

Arun Sahu, Alok Sahu, Chetan Prakash and Joseph Stalin were taken into custody under the provisions of Prevention of Money Laundering Act (PMLA) in the case related to the app named ‘Fiewin’, the federal probe agency said in a statement.