At least 42 CRPF troopers were killed when a suicide bomber owing allegiance to terror outfit Jaish-e-Mohammad rammed an explosive laden SUV into one of the buses of a CRPF convoy on the Srinagar-Jammu highway in Pulwama district.
Local media reports said the Pakistan-based Jaish-e-Mohammed group had claimed responsibility.
Prime Minister Narendra Modi on Thursday condemned the terrorist attack at a CRPF convoy in Jammu and Kashmir's Pulwama in strong words and said "sacrifices of our courageous security personnel shall not go in vain".
Indian Prime Minister Narendra Modi called it a "dastardly attack", adding that the "sacrifices of the fearless soldiers will not go in vain".
A vehicle laden with explosives slammed into the convoy, killing at least 44 soldiers in the deadliest attack on security forces in decades in the region, raising tensions with Pakistan which claims the territory.
Thursday's explosion was heard from several miles away, according to witnesses.
The scale of this terror strike has exceeded even that of the Uri attack on September 2016, when four heavily armed terrorists targeted an army brigade headquarters - causing 19 deaths.
Photos showed the blackened, mangled remains of at least one vehicle littered across the highway.
Kashmir Governor Satya Pal Malik accused Pakistan of guiding the attack. "I strongly condemn this dastardly attack".
The incident took place when a vehicle laden with explosives hit a convoy of India's paramilitary Central Reserve Police Force triggering off intensive blasts.
The United States' ambassador to India condemned the attack and offered condolences.
Tension with Pakistan rose after that incident when New Delhi said the attackers had come from Pakistan to stage the attack. From IC 814 to Parliament attack to Badambi Bagh attack to Tangdhar and Nagrota to Pulwama police lines attack. Besides, 38 others were wounded in the worst-ever terror attack in Jammu and Kashmir since 1989.
After India gained independence in 1947, Kashmir has been bitterly contested by both India and Pakistan, resulting in three wars between the two countries and numerous other skirmishes. "Visibly it seems to be guided from across the border as Jaish-e-Mohammed has claimed responsibility", Malik said in a statement.