Earlier on January 21, Pakistan violated the ceasefire in Poonch in which an Army personnel was killed.
The Pakistani army opened fire with small arms and lobbed mortars along the LoC in Shahpur sector, the officials said.
The Shahpur sector witnessed heavy mortar shelling by the Pakistan side twice during the day, prompting strong retaliation by the Indian Army, the officials said.
The officials said Pakistan Army also resorted to mortar shelling in Balakote, Digwar and Kirni sectors along the LoC in Poonch district.
A joint search operation by police and Rashtriya Rifles of the Army is underway after the whole area was cordoned off to nab him, the SSP said.
Two Army personnel were injured in a landmine blast along the Line of Control in Jammu and Kashmir's Poonch.
The firing and shelling from across the border in Mendhar sector started at 4.15 pm, prompting a befitting retaliation by the Indian army, the spokesman said.
This was the third round of recovery of arms and ammunition in the district following the busting of a three-member module of Jammu and Kashmir Gazanvi Force.
The boy identified as Ali Haider was apprehended by SOG party near Batar nallah near village Ajote in Poonch.
Militant outfits were trying to target religious places in Poonch but their nefarious designs have been foiled by the Army and police.
Constable PK Dass, posted in 168th battalion, was on sentry duty when he shot himself with his rifle at Uchad camp in Mendhar area, they said.
Indian troops mounted an effective retaliation to the unprovoked ceasefire violation from the other side, they added.
The first-ever DDC elections in Jammu and Kashmir were held in eight phases and authorities have put in place all arrangements for counting of votes on Tuesday.
At about 1940 hours (7.40 pm) today, Pak army initiated unprovoked ceasefire violation by firing with small arms and intense shelling with mortars.
Ballot papers and other polling materials were torn apart by the duo, who later escaped from the spot.