Prime Minister Manmohan Singh described Pakistan as the 'epicentre of terrorism in the world' and said it had failed to take effective action against militants, in an interview published on Wednesday.
Speaking to the Financial Times, Singh said Islamabad was either 'unable' or 'unwilling' to control Pakistan-based terrorist group Lashkar-e-Taiba, which New Delhi accuses of staging the November attacks on Mumbai that killed 165 people.
"The proof of the pudding is in the eating," he said.
Singh said that despite pledges by Pakistan throughout the past decade that it would not be a launch pad for attacks against India, "in practice no effective action has been taken to control terror."
He added: "We all know the epicentre of terrorism in the world today is Pakistan. The world community has to come to grips with this reality."