Pak forces violated ceasefire twice in one day.
Indian troops also fired in retaliation and the firing stopped from both sides around 1 pm
The exchange of fire between the two sides in Noushera sector continued for nearly four hours.
An army jawan committed suicide by consuming poison at his house in Rajouri district of Jammu and Kashmir, official sources said. Naresh Kumar, (29), a sepoy of 8 Jammu and Kashmir light infantry consumed poison at his home in Dabad village in Noushera tehsil of Rajouri district late on Thursday night.
At least 2-3 Pakistani armymen are believed to have been killed on Tuesday in the retaliatory firing by Indian troops in the Noushera sector of Rajouri district while seven women, including six members of a family, were injured in R S Pura sector of Jammu district in cross-border shelling.
India and Pakistan agreed on a ceasefire along the border in J&K, the first formal truce between the two armies since the outbreak of militancy in the state.
Terror outfit Islamic State is trying to gain a foothold in Pakistan occupied Kashmir, a senior Army official said on Friday.
Pakistani troops fired 82 mm mortar bombs, used small and automatic weapons in the firing on forward Indian posts in Laam Battalion area in Naushera.
The army foiled an infiltration bid shooting dead a militant in an encounter along the Line of Control in Rajouri district on Thursday.
People of this village allege that heavily-armed militants used to enter their houses at gun point, eat and even harass women.
Pakistan Rangers resorted to ceasefire violations by targeting civilian population in RS Pura sector in Jammu.
The ceasefire violation took place around 8:30 am. A JCO of the army and a BSF head constable were killed in the attack, a senior officer of the paramilitary force said.
The major ceasefire violations took place on 3, 4 and 5 October along the Line of Control in Jammu region.
Five other civilians injured as Pak troops shelled border out posts along the IB.
This move by the BSF is in protest to the growing incidents of ceasefire violations across the Line of Control and the International Border.
"Pakistan troops resorted to unprovoked firing in three areas of Noushera Rajouri district from 05:15 hours today," Defence Spokesman Col Manish Mehta said. They fired mortar bombs, automatic weapons and small arms, he said, adding that Indian troops gave a befitting reply.
In an escalation of cross-border military confrontation, 8 civilians were on Tuesday killed and 22 injured in Jammu region due to Pakistani shelling, prompting a strong retaliation by the Indian army in which two Pakistani soldiers were killed and 14 posts were destroyed.
Over 40 people are missing after a bus carrying a marriage party, including the bride and groom, was washed away in flash floods in Jammu and Kashmir's Rajouri district on Thursday.
The recoveries made from the gunned-down terrorist included two assault rifles along with two magazines and 234 rounds of bullets, five pistols with 10 magazines and 60 rounds, 15 hand grenades and 12 fuses for IEDs.
Curfew remained in force on Saturday in violence-hit Kishtwar district, even as protests against Friday's communal clashes there rocked Jammu and adjoining districts, where normal life was disrupted due to a bandh.
Jammu and Kashmir registered its highest turn-out in assembly elections in the last 25 years with an estimated 65 per cent of voters casting their votes, as the fifth and final phase of polling ended on Saturday. Jharkhand, which also went to the polls along with J&K, broke all previous polling records to witness over 66 per cent of turn-out in the five phases, bettering the previous mark of 54.2 per cent in the 2004 assembly poll.