In a televised address to the nation, Prime Minister Manmohan Singh [Images] said that those behind the terror attack in Mumbai were from outside India

He promised that: "We will take the strongest possible action. We'll take a number of measures to strengthen our security forces."

He also said the National Security Act will be enforced so that terrorists cannot escape the clutches of law. A Federal Investigation Authority will be set up to fight terror in a co-ordinated manner, he added.

He said India will take up with neighbouring country the use of their territory to launch attacks against the country.

                                                      The full text of the PM's statement