Experts of the National Security Guard (NSG) and investigators of the National Investigation Agency (NIA) left for Jammu and Kashmir on Friday to join the probe into the attack in Pulwama in which at least 42 CRPF personnel were killed, officials said.
The decision to send the teams was taken in view of the high number of casualties in the worst strike in the state since the Uri attack in 2016.
On Thursday, a home ministry official had said an NIA team with forensic experts was being sent to Srinagar to assist Jammu and Kashmir Police in forensic evaluation of the scene of crime.
Explosive specialists of the Black Cat commando force NSG would also join in the investigation into the attack, another official had said.
At least 42 CRPF personnel were killed and five injured in one of the deadliest attacks in Jammu and Kashmir when a Jaish suicide bomber rammed a vehicle carrying over 100 kg of explosives into their bus in Pulwama district on Thursday.
More than 2,500 Central Reserve Police Force personnel, many of them returning from leave to rejoin duty in the Valley, were travelling in the convoy of 78 vehicles when they were ambushed on the Srinagar-Jammu highway in Awantipora in south Kashmir.