Local media reported that the Pakistan-based Jaish-e-Mohammed Islamist group claimed responsibility, with the vehicles driven by a known local militant, Aadil Ahmad alias Waqas Commando.

Kashmir has been split between India and Pakistan since independence from Britain in 1947 with both nuclear-armed countries, which have fought three wars, claiming it as their own.

Jaish-e-Mohammed is largely considered to be one of the most active Pakistan-backed insurgent groups fighting in Kashmir, and was the first militant group to introduce suicide bombers into the conflict.

“If our neighbouring country thinks that it will succeed in creating instability through such acts and conspiracies in our country, they should stop dreaming,” Modi said, adding that the “blood of the people is boiling”.

Arun Jaitley, finance minister, promised all steps to “ensure the complete isolation from the international community of Pakistan of which incontrovertible evidence is available of having a direct hand in this gruesome attack”.

Islamabad, however, hit back at the suggestion.

“We strongly reject any insinuation by elements in the Indian media and government that seek to link the attack to Pakistan without investigations,” the Pakistan foreign ministry said.

– Body parts –

The United States condemned the attack in “the strongest terms”, and called on “all countries…to deny safe haven and support for terrorists”.

Blackened, mangled remains of at least one vehicle littered the highway. Reports said bodies and body parts were strewn around, making victims’ identification difficult.

Afterwards, hundreds of government forces cordoned off around 15 villages in the district the bomber came from and conducted house-to-house searches, a police officer and witnesses said.

A team of elite anti-terror agency investigators were flying to Srinagar on Friday and India’s interior minister Rajnath Singh was also scheduled to visit.

The attack surpasses one in 2016 that was the biggest in 14 years, claiming the lives of 19 soldiers in a brazen pre-dawn raid by militants on the Uri army camp.

India responded to that with the now-famous “surgical strikes” — there is a Bollywood movie — across the heavily-militarised Line of Control, the de-facto border, several miles into Pakistan-administered Pakistan.

– Hawks –

“The current situation has all the making of an India-Pakistan crisis,” said Moeed Yusuf from the US Institute of Peace. “The next 24-48 hours are crucial. This could get bad.”

But beyond this, Modi has “no easy options”, Manoj Joshi from the New Delhi based Observer Research Foundation think-tank told AFP.

Military action could “escalate into something big”, he said.