US intelligence seems to thinks the group responsible may be Lashkar-e-Toiba. From the New York Times:
WASHINGTON — American intelligence and counterterrorism officials said Friday that there was mounting evidence that a Pakistani militant group based in Kashmir, most likely Lashkar-e-Taiba, was responsible for this week’s deadly attacks in Mumbai.
The officials cautioned that they had reached no firm conclusions about who was responsible for the attacks, or how they were planned and carried out. Nevertheless, they said that evidence gathered in the past two days pointed to a role for Lashkar-e-Taiba or possibly another group based in Kashmir, Jaish-e-Muhammad, which also has a track record of attacks against India.
US intelligence has more credibility in these matter than India intelligence. If this is confirmed, it looks like bad news, especially if we begin seeing evidence support from the Pakistani government.
According to one Indian intelligence official, during the siege the militants have been using non-Indian cellphones and receiving calls from outside the country, evidence that in part led Indian officials to speak publicly about the militants’ external ties.
Lashkar-e-Taiba denied any responsibility on Thursday for the terrorist strikes. American intelligence agencies have said that the group has received some training and logistical support in the past from Pakistan’s powerful spy service, the Directorate for Inter-Services Intelligence, or I.S.I., and that Pakistan’s government has long turned a blind eye to Lashkar-e-Taiba camps in the Kashmir region, a disputed territory over which India and Pakistan have fought two wars.
Officials in Washington said Friday that there was no evidence that the Pakistani government had any role in the attacks.
Washington would deny that, wouldn't they? They don't want to see a nuclear war on the peninsula. What interests me is why the head of the ISI cancelled his trip to India, and instead is sending some flunky in his place. Perhaps he know that a drip-drip of information will point to his organization, and does not wish be embarrassed by the Indians asking questions. Stay tuned.