Another Mumbai type terrorist attack on an Indian city may provoke a full blown India-Pakistan war, a panel of top US counter experts has warned on the ninth anniversary of the 9/11 terror attacks.

"One of the more predictable foreign policy challenges of the next years is a 'Mumbai II', a large-scale attack on a major Indian city by a Pakistani militant group that kills hundreds," said a 42-page analysis report produced by the non-partisan National Security Preparedness Group,