An encounter broke out between terrorists and security forces near Ban Toll Plaza in the Nagrota area of Jammu district on Thursday morning, officials said.
According to officials, the Jammu-Srinagar national highway was closed in view of the encounter. Security has also been tightened in the Nagrota area.
The area has been cordoned off and additional forces have reached the spot.
Sources said four terrorists are trapped and exchange of fire is underway. Some reports said the terrorists have been killed. There was, however, no official confirmation on this.
Sources say it is a group of terrorists who had recently infiltrated from the international border in Jammu. They were hiding in a cavity inside the truck and were on their way to the Kashmir valley.
This is the second such operation on the Jammu Srinagar National highway this year. In January three terrorists were gunned down by the security forces. They had adopted the similar modus operandi by hiding inside a truck.
Further details are awaited.
(With agencies)