But few if any of the major militant leaders India is asking Pakistan to prosecute are included on this list, the official said. That reflects the delicate balance Pakistan is trying to achieve: appeasing international pressure to crack down on militants who have operated from its soil, and at the same time not completely dismantling groups that the intelligence agencies still see as assets.
Indian and U.S. authorities have accused the Pakistani militant group Lashkar-e-Taiba and its charity arm, Jamaat-ud-Dawa, of planning the attacks that killed 165 people in India's financial center. For months Pakistan's politicians have been promising to crackdown on militants, but until now there has been no indication that Pakistan's government had planned the prosecution of anyone related to the November attacks, as it is required to by a United Nations Security Council resolution passed in early December.
The attacks forced Pakistan to choose between continuing to support, or at least shelter, a group created by its powerful spy agency almost 20 years ago, or shutting it following massive international pressure. That debate has played out inside the government and military for weeks, officials tell ABC News, with some in the government initially arguing for the extradition of some suspects to India.
"We assure India if somebody is found guilty, we'll proceed according to our own laws of Pakistan," Prime Minsiter Yusuf Gilani said on Sunday in response to an ABC News question.
Lashkar-e-Taiba was created with the backing of the Pakistani Inter Services Agency, or ISI, in the early 1990s, though its scope has expanded to include all of India. Lashkar fighters have also been found fighting U.S. soldiers in Afghanistan. The group is one of a handful set up with the help of the military-controlled spy agency to fight in India, Kashmir, or in Afghanistan.
"The military strategically saw these groups as really the front line to keep India at bay, to keep the Kashmir struggle going, and to keep all the neighborhood in a very tense situation," says Ahmed Rashid, the author of "Descent into Chaos." "There is a great reluctance to give up on these guys."
Asked if plans to prosecute were evidence of Pakistani leaders' suspecting the Obama administration will be tougher on them than was the Bush administration, an Obama administration official told ABC News, "I see this as evidence that Pakistan recognizes these extremists threaten Pakistan as well as the U.S. We need an alliance against the extremists, and I believe that is what you will see us work to build."
U.S. and Indian authorities do not differentiate between Lashkar-e-Taiba and Jamaat-ud-Dawa, which was banned by the Pakistani government after the attacks. But Jamaat is a popular charity in Pakistan, where the government will have to step carefully in its prosecution effort to avoid angering the population. Late last year, Pakistan's interior chief admitted to ABC News that cracking down on militants too strongly could produce instability in the country.
"The risk -- I tell you what it is," Rehman Malik said in an interview. "Street power. Because the religious parties and the extremists are joining hands, we are already seeing that... violence, yes, that is a risk [as well]."
Members of the group of 125, all of whom will appear in court as early as tomorrow, were arrested around the country following the attacks, the Interior Ministry has said.
Those arrests followed Indian and United States pressure, as well as a United Nations Security Council resolution that requires Pakistan to "bring proceedings against persons and entities within their jurisdiction."
India says it is waiting for Pakistan to act, four weeks after handing over a 53-page report detailing all the information they had on the attack and its origins. As part of that report, obtained by ABC News, Indian authorities detailed how the terrorists used Voice Over Internet Protocol technology to communicate -- presumably the same evidence Pakistan will use to prosecute under its cyber crimes law.
"The controllers/handlers of the terrorists passed instructions over telephone throughout the operations," the report says. "They used VOIP calling platforms. Investigations in the numbers used by the controllers/handlers have revealed that one number is a 'virtual number' and five are [Direct Inward Dialing] numbers with the country code of Austria."
In India as well as in the West, it has become clear in the last few weeks that only successful prosecutions by Pakistan would lessen the international community's pressure.
"It is vital that the detentions are turned into prosecution with charges, and if found guilty, for the persons to be punished," British Foreign Secretary David Miliband said in Islamabad earlier this month. "The whole international community wants Pakistan to go farther and go faster."
ABC News' Jake Tapper contributed reporting from Washington, D.C.
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