PESHAWAR, Pakistan—Pakistani security forces raided two militant hideouts in a former Taliban stronghold near Afghanistan, triggering shootings that killed four soldiers and two insurgents, the military said Friday. The first raid was carried out in the Tank district in the northwest, killing two militants, the statement said. The other strike was carried out in the North Waziristan district, capturing a militant before four soldiers died in the fighting. The military said troops seized a cache of weapons during both raids. The military provided no further details about the slain soldiers and detained militants. North Waziristan served as a terrorist stronghold for decades. The military carried out a full-fledged offensive in the region after an army-run school was attacked in December 2014 in the Peshawar city. The attack, claimed by Pakistani Taliban, killed 147 people, mostly schoolchildren. The latest violence in the northwest comes a day after a roadside bomb exploded …