They said the army was conducting the operation and the Jammu and Kashmir police were not involved.
A security audit of military bases was carried out on the recommendation of a committee headed by Lt Gen Philip Campose which was set up after the daring terror attack on the Pathankot air force base in 2016.
Army helicopters and drones have been pressed to service recce the area, officials said.More news: Siri-us business: Everything you need to know about Apple's new HomePod
Earlier too Jaish militants had managed to strike at security forces despite advance warnings.
Army is combing the houses inside the Sunjuwan Military Station located along the National Highway 44 near Jammu city.
While there was no action around the main entrance and vehicles were moving along the Jammu-Lakhanpur bypass in front of the camp, army personnel in bullet-proof vehicles engaged in the operation to rescue people from the family quarters in the rear side of the base.
The Congress reminded the government how Pakistan and its intelligence agency ISI have been exporting terror to India for long saying that as many as 342 soldiers have been killed in various such attacks in Gudaspur, Udhampur, Uri, Pampore, Nagrota and Kupwara areas in Jammu and Kashmir and Punjab bordering Pakistan.More news: Health officials: Third NYC child dies of the flu
The operation will continue till all the militants part of the fidayeen attack are apprehended or killed, he added. It came a few hours later when militants sneaked into the airbase and killed six security personnel and one civilian. The Defence Spokesman confirmed that terrorists' belongings clearly indicate that they were Jaish-e-Mohammad cadre.
Similar papers were found on the bodies of intruders who were gunned down during an attack on a police post at Rajbagh police station in Kathua in Jammu on March 20, 2015 and the attack on an Army camp in nearby Samba on March 21, 2015. Another message on the wall read: "Eik shaheed, hazar fidayeen (One martyr, thousand fidayeen)".
Following the attack, the district administration asked the schools within 500 meters of the camp to remain shut.
Meanwhile, Jammu and Kashmir Chief Minister Mehbooba Mufti visited the Military Hospital in Jammu to meet the injured after holding a high level meeting with her cabinet.More news: No, we don't need a tank parade
"This time also the situation was no different", he added.