They said the terrorists opened fire on the vehicle at Botapathri near Nagin post.
Two soldiers who were critically wounded in Thursday's terror attack in Jammu and Kashmir's Gulmarg succumbed to their injuries, raising the death toll in the ambush to four.
The officials said helicopters and drones were pressed into the service to help the forces, who are also using human and technical intelligence inputs to aid the search operation which has been launched to trace and neutralise the terrorists behind the attack.
Three to four terrorists are believed to have carried out the deadly attack on an Army convoy in the Gulmarg sector of Jammu and Kashmir that left four people, including two soldiers, dead, a senior police official said on Saturday.
The attack, which claimed the lives of seven individuals, including a local doctor and two labourers from Bihar, has raised concerns about the unreported trend of local youths joining terrorist groups in Kashmir during this period.