There were unconfirmed reports of one infiltrator being killed in the operation, but there was no official word on it so far.
The officer said a large cache of arms and ammunition, including five assault rifles, seven pistols and grenades, were recovered.
The operation continued for the second day on Monday and it was intensified to track down the infiltrators, the officials said.
Militants hurled a grenade at a security forces party near SBI Main Chowk Sopore in north Kashmir district, a police official said.
Kovind was scheduled to visit the War Memorial at Drass in Ladakh but bad weather forced cancellation of plans and he instead paid tributes to martyrs on the 22nd anniversary of Kargil Vijay Diwas.
Following the cancellation, the President laid a wreath at the Dagger War Memorial in Baramulla in north Kashmir and paid tributes to slain soldiers on the 22nd anniversary of 'Operation Vijay'.
Fayaz Ahmad War alias Rukana alias Umar of Warpora, who was a top commander of the LeT, and Shaheen Ahmad Mir alias Shaheen Molvi of Cherpora Budgam were killed in the encounter.
A case under relevant sections of law was registered in Uri Police Station and an investigation into the matter was initiated.
DGP Dilbagh Singh said the operation was jointly launched by police, army and CRPF on Sunday evening after receiving inputs about the presence of Lashkar militants.
A police official said the encounter broke out at Gund Brath area of Sopore in the north Kashmir district late Sunday night.
The fire broke out late on Thursday at Sweeper Colony in the Noorbagh area, they said, adding that police, fire and emergency services department were pressed into service to douse it.
The 5.6-metre last piece of metal was fitted at the highest point and joined the two arms of the arch that currently stretch towards each other from both the banks.
The Chenab Bridge -- having a length of 1.315 km -- will be the highest railway bridge in the world being 359m above the river bed level and will be 35 meters higher than the Eiffel Tower in Paris.
A police officer said that the IED went off when a police party was patrolling the Chota Bazar area of main town Sopore this morning.
Srinagar, Jan 3 (PTI) Unidentified gunmen tonight shot dead a man in Sopore area of north Kashmir's Baramulla district, police said. The gunmen fire...