Security forces have claimed that four terrorists were hiding in the truck and they were killed in the truck itself. Several rounds of firing took place from both sides. As soon as the firing started, the security forces surrounded the truck, proactively and did not allow the terrorists to get out

source https://news.abplive.com/videos/news/india-nagrota-toll-plaza-encounter-video-surfaces-area-cordoned-off-abp-exclusive-1392175