Ravi Uppal, one of the two main owners of the Mahadev online betting app, has been detained in Dubai by the local police on the basis of a red notice issued by the Interpol at the behest of the ED, official sources said Wednesday. Uppal, 43, was detained last week in that country and the Enforcement Directorate (ED) authorities are in touch with the Dubai authorities to get him deported to India, they said.