Lashkar-e-Taiba possibility, that the attacks may have been carried out by the "Indian Mujehideen" (or Mujahideen, depending how you transliterate).
An Indian security official who spoke on condition of anonymity because he was not authorized to be identified said the name suggested ties to a group called Indian Mujahedeen, which has been implicated in a string of bombing attacks in India killing about 200 people this year alone.
On Sept. 15, an e-mail message published in Indian newspapers and said to have been sent by representatives of Indian Mujahedeen threatened potential “deadly attacks” in Mumbai. The message warned counterterrorism officials in the city that “you are already on our hit-list and this time very, very seriously.”
Does this rule out Pakistani involvement? Decidedly not. But put put the Indian Mujahideen on the suspects list with Lashkar-e-Toiba.