A local government official says militants set off a roadside bomb near a Pakistani army convoy in a tribal region close to the Afghan border, sparking clashes that killed one soldier and 20 militants.
Wajid Khan says the incident took place in Khanki village in the Upper Orakzai region on Friday.
He says 25 soldiers were wounded in the militants' attack. He says the troops repelled the attack, surrounded and killed 20 militants.
The region is home to insurgents loyal to Pakistani Taliban chief Hakimullah Mehsud.
Some insurgent commanders in Pakistan have claimed to be in peace talks with the government recently. Others have denied any negotiations, as has the government.