According to the police, the arrested accused have been identified as Mudasir Farooq Bhat, Tauqil Ahmad Bhat, Asif Bhat, Khalid Latif Bhat, Gazi Iqbal and Tariq Hussain Mir.
Both the attackers, the other a local, involved in the pre-planned attack were identified, it said, adding that all 10 security guards of the slain BJP leader were arrested.
The DGP said that as per disclosures made by the two arrested LeT operatives, the weapons were to be delivered to Dar for carrying out terror attacks in the Valley.
The encounter took place at night in the Sangam area of Bijbehara in south Kashmir, a police official said. The slain ultras belonged to LeT, the official said, adding that they were being identified.
The official said as security personnel were conducting searches in the area, they came under heavy gunfire from militants hiding in the besieged area.