LAHORE, Pakistan — Pakistan’s air defense system shot down a drone early Thursday near a naval air base in the eastern city of Lahore, Pakistani police and security officials said, as India evacuated thousands of people villages near the two country’s highly militarized frontier in the disputed region of Kashmir.

Pakistan’s army spokesman, Lt. Gen. Ahmad Sharif, said an Indian drone attacked a military target near Lahore overnight, wounding four soldiers, while the country’s air defense system intercepted and shot down 12 Indian drones that entered Pakistani airspace at various locations.

Pakistan and India accused each other of launching drone attacks, and Islamabad’s Defence Minister said further retaliation was “increasingly certain”, on the second day of major clashes between the nuclear-armed neighbours.