Malik claims whenever security forces have the upper hand in Kashmir Valley, directions come to militants from across the border for staging a fidayeen attack.
Mufti on Saturday had appealed to the Centre and the militants to announce ceasefire in Jammu and Kashmir for the Muslim fasting month of Ramzan.
It said the attackers had rammed a vehicle into a security barrier around the base in an attempt to gain entry.
WATCH | 'It's not Jihad but Jahalat': Kashmir villagers pleaded with terrorists who killed 12-year-old boy
The Lashkar-e-Taiba terrorists wanted to sexually abuse the boy's sister but the family had helped her escape, which infuriated them and they started beating up the family members.
At least six militants, including three Pakistanis, were killed in three separate encounters with security forces in Kashmir on Friday.
The attack late Saturday took place in Yoetayoke village, just an hour north of Rakhine state's capital Sittwe.
The grenade has been defused and three suspected militants of the Adivasi militant group arrested in connection with the incident, Sarma said, adding that the situation was under control.
The shutdown, which began at 5 am, mostly affected life in Barak Valley, which is predominantly inhabited by Bengali-speaking people, and parts of the Brahmaputra Valley, officials said.
The police suspected the hand of the Paresh Baruah faction of the insurgent group ULFA-Independent in the killings, but the outfit has washed its hands of the incident.
The militants were killed after the security forces started a cordon and search operation following a tip-off.
Militants opened fire on a patrolling party of the Army at Poterwal village of the south Kashmir district.
North Waziristan has long been a sanctuary for the Pakistani Taliban and other militant groups.
Two policemen and a CRPF jawan were also injured in the gunfight and have been hospitalised.
Of those killed, 30 were policemen while nine were Special Police Officers.
An Iranian military spokesman said the gunmen who on Saturday attacked a military parade in the southwestern city of Ahvaz were trained by two Gulf Arab states