Mumbai (JPN/Bureau): The fever of the Cricket World Cup 2011 reached crescendo. Billion fans along with bookies back India to win the title.

Underworld is also not left untouched with the cricket frenzy as they seek help from top bookies to manipulate few matches in their favour.

The 49 matches of the Cricket World Cup would nearly generate 600 billion dollars of betting revenue, much more than the defence budget of the country.

India's defense budget for 2010 and 2011 is nearly 147 billion dollars.

Sources claim that the illegal earnings from the 18 group elimination matches are estimated between Rs 1,500 crore and Rs 2,000 crore per match, while the betting amount could escalate for the quarter-finals to anywhere between Rs 2,500 crore to Rs 3,000 crore.

According to internal sources, most bookies and their customers have shifted their bases to farmhouses in the outskirts of the city. Most of them have camouflaged themselves in casinos of Goa and Gujrat.

A bookie said that Mumbai is not safe for betting as police keep a close vigil and may catch them through phone tapping.

“Underworld is actively engaged in betting and Dawood Ibrahim's henchmen are operating the network from Southeast Asia,” he added.