Zabihullah Mujahed, a group spokesman, told the AFP news agency that the Taliban would have been proud to claim responsibility for the attack but they had not been involved.
"We wish we had carried out this attack ... since India has been the enemy of the Islamic emirate," he said.
"They send secret military experts to Afghanistan and they train (the) Afghan army.
"Had we carried out the attack, we would have claimed responsibility for it with pride since we have good reasons for it."
Mujahed said America, China, Russia, Iran, Pakistan and other countries around "are rivals in Afghanistan and this attack may be the result of this rivalry".

Somebody teach them to rap