Indian newspapers said on Friday the government had proof that Pakistan's military spy agency was involved in the Mumbai attacks, including evidence supplied by the US Federal Bureau of Investigation.

US Secretary of State Condoleezza Rice called on Opposition leader LK Advani here this evening during which she is believed to have assured Washington's "full cooperation" to India in the aftermath of Mumbai terror attacks.

While the nation is still mourning the victims of Mumbai terror attack, yet another terror mail sent by Deccan Mujahideen to a local Gujarati TV channel has sent a chilling reminder to the security agencies about the destructive motives of the terrorists.

For the last three days, as the horror of Mumbai has unfolded, something about the images have told us that we've seen them before in other cities and in other countries across continents.

US officials fear that should the firm evidence emerge that the Mumbai terror attacks were planned and directed from within Pakistan, it would certainly escalate tension between the neighbouring countries and could also provoke an Indian military response, even strikes against militants, a media report said on Saturday.