Foreign investigators in Mumbai

New Delhi: India is intensifying cooperation with foreign investigative agencies, a move likely to put extra pressure on Pakistan to admit its alleged involvement in the Mumbai attacks, said an intelligence official.

At least nine officers from the US's Federal Bureau of Investigation and Britain's famed Scotland Yard, are helping central intelligence agencies to decipher internet telephony signatures intercepted by Indian intelligence. The terrorists reportedly received calls from Pakistan.

Investigators were trying to break the code to see where these calls originated and were also carrying out forensic tests of samples of the explosive material used in the bombings