Pakistani security forces say they have arrested at least 15 suspected militants and recovered a large quantity of weapons during raids in the North Waziristan tribal region.
A military statement on Monday says most of the suspects were arrested in the region's main town of Miran Shah.
It says several men surrendered without resistance, after troops surrounded an Islamic seminary and a nearby house.
Also Monday, security forces in the same region found the remains of three men killed on suspicion that they were spies for the United States. The attackers left a note saying that anyone spying for America will meet the same fate.
Pakistan, a key ally in the U.S.-led war on terrorism, has been trying for the past 18 months to flush out militants from the region on the Afghan border -- a possible hideout for Osama bin Laden.