AN unknown group calling itself Inquilab (revolution) has claimed responsibility for three blasts in New Delhi which killed 61 people.
The claim came in calls to reporters in Srinagar, summer capital of Indian Kashmir.

"Such attacks will continue until India pulls out all its troops from the state (of Kashmir) and stops inhuman activities in the state," the group's spokesman, Ahmed Yar Gaznavi, told local news agency Kashmir News Service.
"Activists from our Inquilab group carried out the blasts," Mr Gaznavi told the news agency, which often receives calls from militant groups operating in Kashmir.

Two reporters who received the call said that from the accent of the caller he did not sound Kashmiri.

Television channels said Inquilab was an offshoot of the pro-Pakistan Islamic militant group Lashkar-e-Taiba, one of a dozen rebel outfits which have been engaged in an insurgency against Indian rule in divided Kashmir since 1989.
Lashkar has rarely claimed responsibility for its attacks in the past.
Police said they had no record of the existence of Inquilab but were investigating the claim.

Source

Update: Reuters has more info