The blast took place on a heavily guarded highway/BBC
India has said it will ensure the "complete isolation" of Pakistan after a suicide bomber killed 46 soldiers in Indian-administered Kashmir.
Federal Minister Arun Jaitley said India would take "all possible diplomatic steps" to cut Pakistan off from the international community.
India accuses Pakistan of failing to act against the militant group which said it carried out the attack, reports BBC.
This is the deadliest attack to hit the disputed region in decades.
Both India and Pakistan claim all of Muslim-majority Kashmir but only control parts of it.
An insurgency has been ongoing in Indian-administered Kashmir since the late 1980s and there has been an uptick in violence in recent years.