In a massive combing opeartion early on Saturday morning, the Mumbai police have detained more than 200 people in Mahim in north-central Mumbai for questioning regarding Tuesday's terrorist attacks in the city.

One of the seven bombs that ripped through seven trains on Tuesday killing close to 200 people went off near Mahim, and there were reports of some telephone calls being made from the area to Karachi and Dubai.

About 400 policemen were part of the combing operation.