Grieving India Hunts for Clues in Mumbai Inquiry

Indian officials continue to look for traces of Pakistan's involvement, while the Pakistani government claims none of its state agencies were involved in the coordinated attacks on 10 targets in Mumbai that killed 183 people over a three-day span.

Shivraj Patil, India's top domestic security official, resigned after his office failed to prevent the attacks in the country's financial capital that ended on Saturday.

On Monday, India's foreign ministry said it informed Pakistan's high commissioner that the attacks were carried out by elements from Pakistan.

India's Foreign Ministry spokesman Vishnu Prakash said the high commissioner was told that India "expects that strong action would be taken against those elements," the Associated Press reported.

The attacks heightened fears of renewed violence between India and Pakistan, both nuclear-armed countries who have fought three previous wars. Pakistan recently elected a civilian government to replace President Pervez Musharraf with President Asif Ali Zardari.

A senior official involved with the investigation told Reuters that the militants who carried out the attacks had months of military training in Pakistan.

"They underwent training in several phases, which included training in handling weapons, bomb making, survival strategies, survival in a marine environment and even dietary habits," a second officer told Reuters.

A previously unknown Muslim group Deccan Mujahideen claimed responsibility for the attacks, but Indian officials said another group, Lashkar-e-Taiba, was responsible. Lashkar-e-Taiba, considered a terrorist organization by the U.S. and Britain, was formed to help fight India in Kashmir, a long-disputed region between India and Pakistan.

The group was blamed for an attack on India's Parliament in December 2001 and in the past had close ties to the Pakistani government's Inter-Services Intelligence.

President George Bush's administration said that in the continuing investigation, it had not found evidence suggesting involvement by the Pakistani government and White House spokeswoman Dana Perino would not comment on any possible involvement.

Perino said that Pakistan pledge to work with India on the investigation.

"We have been encouraged by the statements by the Pakistanis that they are committed to following this wherever it leads. We would expect nothing less of them on this instance," Perino said, according to Reuters.

Pakistan denied involvement by any of its state agencies in the attacks and called them a "barbaric act of terrorism," according to Reuters.

Pakistani Prime Minister Yousaf Raza Gilani called leaders to a conference on Tuesday to discuss relations with India after the attacks, Gilani's spokesman Zahid Bashir said on Monday.

U.S. Secretary of State Condoleezza Rice said on Monday that world leaders must commit to "following up whatever leads there are, in making sure that the people who perpetrated this act are brought to justice."

Rice, appearing in London with British Foreign Secretary David Miliband, said the U.S. expects full cooperation from Pakistan. She will travel to New Delhi later this week.