At least 43 fighters have been killed by troops in Pakistan's northwestern Khyber region, government officials say.
At least 15 fighters were killed on Saturday in the first clash, while 28 others were killed in air raids on suspected fighters' hideouts, the officials said on Saturday.
The Khyber operation was launched about a week ago after a bombing at a border checkpoint killed 19 police officers.
Tariq Hayat, a senior government official in Khyber, said the operation would continue until all fighters were flushed out of the region.
Intense pressure
Fighters frequently attack trucks along Khyber, a main route for supplies destined for US troops in Afghanistan.
Pakistan is under intense US pressure to crack down on fighters along the Afghan border.
PHOTO CAPTION
Map of Pakistan locating Khyber region
Agencies