Militant groups Lashkar-e-Taiba (LeT) and Hizb-ul-Mujahideen on Wednesday denied any role in the bomb blasts in Mumbai and described the attacks as "barbaric" or "outrageous".

Security officials have said Pakistan-based LeT is the prime suspect for the seven bomb blasts on Mumbai's rail network on Tuesday. But Lashkar denied any role.

"These are inhuman and barbaric acts. Islam does not permit the killing of innocent people," a man who identified himself as "doctor Ghaznavi", spokesman of the Lashkar-e-Taiba said.

"Blaming LeT for such inhuman acts is an attempt by the Indian security agencies to defame Kashmiri mujahideens (freedom fighters)," he said in telephone calls made to newspaper offices in Srinagar.

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