India has proof that ISI was involved in planning the Mumbai terror attacks and training the terrorists who killed 183 people during a 60-hour siege of the country's financial capital, sources said.

The names of trainers and the places where meticulous training took place are also known to the government, the sources said.

The United States is believed to have even more evidence some of which it has shared with India, they said.

Chairman of US Joint Chiefs of Staff Admiral Mike Mullen, who was in Pakistan on Wednesday, is believed to have told his Pakistani interlocutors that Washington had enough evidence to show a Pakistani hand in the attack, the sources said.

Sources also refuse to believe that the Pakistani army did not have knowledge of the Mumbai operation given that ISI is controlled by it.

At the same time, sources do not believe that the civilian government in Pakistan is involved in the attack. In fact, one view is that the civilian government itself may be a target of the strike which may be used by the army to heighten tensions with India to return to power.

Washington has asked Pakistan to crackdown on Lashkar-e-Toiba, which now goes under the name of Jamaat-ud-Dawa, and to arrest its chief Hafeez Mohd Saeed because it has evidence of their involvement in the attack, the sources said.

The attack was planned, equipped and organised in Pakistan where the terrorists were trained and provided logistical support.

Contrary to the version that the terrorists used a hijacked Indian fishing boat to reach Mumbai after sailing from Karachi, the view is that much more sophisticated means were used.

... contd.