Little-known outfit Lashkar-e- Qahhar yesterday night purportedly claimed responsibility for Tuesday's serial blasts in Mumbai. An e-mail, received by Aaj Tak news channel, said it was sent by Lashkar-e-Qahhar and the outfit was associated with al-Qaeda and Pakistan-based Lashkar-e-Taiba. The e-mail said 16 Qahhar activists had carried out attacks in Mumbai and threatened to carry out more attacks if the Indian Government does not stop the "exploitation of Kashmiri people". The same outfit had claimed responsibility for the bomb blasts in Varanasi in March this year.