Three people -- including the mother of the assailant -- succumbed to the injuries suffered in the assault, while at least seven others were injured in the incident, they added.
The "hybrid" terrorist, Sajad Ahmad Tantray alias Furqan, was involved in the killing of a non-local labourer at Rakhmomen in Anantnag's Bijbehara on November 12.
The police said Tantray was involved in the killing of a non-local labourer on November 13 at Rakhmomen, Bijbehara.
The injured were shifted to a nearby hospital for treatment.
There were no reports of any casualties so far on either side.
The security forces launched a cordon and search operation in the Tangpawa area of the south Kashmir district late on Sunday night after receiving specific input.
Due to the non-availability of a gynaecologist, pregnancy care has also been hit badly and women in the area face severe hardships.
The slain terrorists, who were identified as Fayaz Kumar and Owais Khan, were involved in several terror attacks, they said.
While Vikar Rasool, G M Saroori and Manohar Lal are the candidates from Jammu, Peerzada Mohammad Sayeed, Tariq Hamid Karra and Ghulam Nabi Monga are in the race from Kashmir.
An encounter broke out between militants and security forces in Anantnag district of Jammu and Kashmir on Friday, police said.
Taking advantage of the darkness and the civilian presence, the terrorists managed to escape from the site of the encounter but efforts are on to locate them, officials said.
The operation turned into an encounter after the hiding terrorists fired at the security forces, the spokesman said.
An encounter broke out between security forces and militants in Anantnag district of Jammu and Kashmir on Saturday, police said.
Acting on specific information regarding the presence of the terrorist in village Sirhama, security forces had launched a cordon and search operation there.
The militants hurled the bomb at a security forces patrol party at Goriwan Chowk in the Bijbehara area of south Kashmir, they said.
Jammu and Kashmir: Amid ceasefire call, cop dies in militant attack and BSF man killed in Pakistan fire
However, a search operation was on as a group of terrorists is suspected to have crossed the border in an another Pakistan-backed infiltration bid on Sunday night.
Internet services on mobile devices were snapped shortly after clashes broke out at many places in south Kashmir.
Two Army jawans were today killed in separate encounters in south Kashmir in which eight militants were gunned down.
All schools and colleges will remain shut as well as the exams scheduled for Monday by the Kashmir University were postponed.