MIR ALI, Pakistan (AP) - Militants clashed with Pakistani troops advancing into their main sanctuary near the Afghan border Sunday amid signs the army faces a far tougher fight than in other assaults against al-Qaida and the Taliban in the northwest.
The operation in South Waziristan follows repeated requests from the U.S. to take on the jihadists behind soaring terrorist attacks in the nuclear-armed nation and al-Qaida and other extremists believed to be plotting strikes in the West.
The push involves mostly poorly equipped soldiers trained to fight conventional wars, not counterinsurgency operations, who have failed in three other campaigns in the mountainous region since 2004. The region is almost wholly under Taliban control.
Reporters are blocked from visiting the region, but accounts Sunday suggested that the 30,000 troops were in for a bloodier time than in the Swat Valley, another northwestern region that the army successfully wrestled away from insurgents earlier this year.
"Militants are offering very tough resistance to any movement of troops," Ehsan Mahsud, a resident of Makeen, a town in the region, told The Associated Press in the town of Mir Ali, close to the battle zone. He and a friend arrived there early Sunday after traveling through the night.
Fighting early Sunday in the Sarwaki area left one solider and seven militants dead, said intelligence officials on condition of anonymity because they were not authorized to speak to media. Authorities said Saturday five soldiers and 11 insurgents had been killed on the first day of the campaign.
Mahsud said the army appeared to be mostly relying on air strikes and artillery against militants occupying high ground. He said the insurgents were firing heavy machine guns at helicopter gunships, forcing the air force to use higher-flying jets.
The army is up against about 10,000 local militants and about 1,500 foreign fighters, most of them from Central Asia. They control roughly 1,275 square miles (3,310 square kilometers) of territory, or about half of South Waziristan, in areas loyal to former militant chief Baitullah Mehsud, who was killed in a U.S. missile strike in August.
Officials have said they envisage the operation will last two months.
A resident in the town of Wana in the heart of Taliban-held territory said the insurgents had left the town and were stationed on the borders of the region, determined to block any army advance.
"All the Taliban who used to be around here have gone to take their position to protect the Meh