The Central government has been warned of the existence of more independent modules of terrorists who could strike terror in Mumbai.

The commercial capital could witness more terrorist acts 'after a lull', an intelligence officer told rediff.com.

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There is a general pattern to the recent blasts in Mumbai, he said adding all the attacks 'may not be coordinated. They are the handiwork of independent cells that may not be aware of each other's existence'.

The new pattern is unlike that in 1993 when the Mumbai underworld was involved and thus it became easy for Indian investigators to pinpoint the mastermind.

The new pattern is of 'smaller, independent units, keeping a low profile but striking effectively at nerve centres', the officer said.

A team of explosives experts from the National Security Guard will study the strength, nature and impact of the explosions, the NSG's Director General Ranjit Shekhar Mooshahary told rediff.com. A Colonel heads the six-member team, which is part of the NSG's National Bomb Data Centre.

The Bomb Data Centre identifies explosives and collects details from blast sites. "Whenever there is an explosion our team visits the site," Mooshahary said.

This helps Central agencies keep themselves up-to-date with the kind of explosives being used by terrorists.

More reports from Maharashtra