The Police has requested citizens not to venture inside the encounter zone since such an area can prove dangerous due to stray explosive materials.
More reinforcements of the security forces have been called in to maintain law and order.
The poster which with the photos of the three militants says that identity of the informant shall be kept secret.
Narayan Dutt, a resident of Katra in Udhampur district, is the fourth truck driver to be killed by militants since August 5 when the Centre abrogated Article 370.
The area has been cordoned off and the exchange of fire is underway.
Some of the terrorists waiting to infiltrate into India were trained at the Jaish-e-Mohammad camp in Balakot which was bombed by Indian Air Force in February, the sources said.
Latoo, the owner of a truck ferrying terrorists and rifles, was also arrested from Pulwama.
LeT tops the list with 112 militants followed by Hizbul Mujahideen with 100 militants, Jaish-e-Muhammad with 58 militants and Al Badr with three militants.
Earlier this month, militants had opened fire and injured four members of a trader's family, including a minor girl, in Sopore.
They were involved in threatening and intimidation of locals by publishing and circulating of posters on the behest of Lashkar-e-Taiba affiliates.
The Army released video clips of arrested militants in which they claimed to have received arms training in militant camps in PoK.
The mayors of Diyarbakir, Mardin and Van provinces in eastern Turkey -- all members of the Peoples' Democratic Party - HDP elected in March -- were suspended.
Sources in the ministry also said 100 companies (10,000 personnel) of central forces had been ordered for deployment about a week ago and they which are in the process of reaching their destinations.
No reason was given for the sudden deployment of over 280 companies late in the evening.
Defence sources said a group of infiltrating militants were challenged by alert troops of the army in Baktur area of Gurez sector on Tuesday.