The Indian Army retaliated to the shelling that took place on Wednesday night.
Pakistani troops resorted to unprovoked firing in Hajipeer area of Uri around 11.30 am on Wednesday, the sources said.
This is for the first time that artillery has been used to target forward posts and villages along the LoC.
Singh said infiltration had reduced by a large extent but the launch pads across the Line of Control were active as militants were waiting to sneak in.
This was the third ceasefire violation by Pakistan in the border district in as many days.
At about 11:30 AM today, Pakistan initiated unprovoked firing of small arms and shelling with mortars in the Sunderbani sector.
The Indian Army guarding the LoC retaliated to silence the Pakistani guns and the cross-border firing between the two sides in Sunderbani sector was going on when last reports were received.
The firing from across the border in Krishna Ghati sector started around 4:45 p.m and was retaliated by the Indian Army 'befittingly', an official said.
At about 4:15 pm, Pakistan initiated unprovoked ceasefire violation by firing of small arms and shelling with mortars in the Sunderbani Sector.
According to the army, the ceasefire violation took place at around 9:30 pm.
Officials said that in the first 11 days of November, as many as 97 Pakistan-initiated ceasefire violations have already been reported.
The shelling from across the border took place in Sunderbani sector around 6.30 a.m., prompting a retaliation by the Indian Army.
The Director-General (South Asia & SAARC) Mohammad Faisal told Ahluwalia that the ceasefire violations by India are a threat to regional peace and security and may lead to a strategic miscalculation.
The Indian retaliation came after unprovoked firing by Pakistan in a bid to push a group of militants into Jammu and Kashmir, the sources said.
Pakistan alleged that in the 'unprovoked firing' by the Indian forces, three civilians were killed and eight others, including women and children, were injured.