Pakistani troops fire on intruding U.S. choppers

By Augustine Anthony

ISLAMABAD (Reuters) - Pakistani troops fired on two U.S. helicopters that intruded into Pakistani airspace on Sunday night, forcing them to turn back to Afghanistan, a senior Pakistani security official said on Monday.

It was the second such incident in a week, and reflects frayed relations with the United States over Pakistan's failure to act more forcibly against Islamist fighters in the tribal lands bordering Afghanistan.

The number of missile attacks by U.S. drone aircraft in the remote tribal areas has multiplied in recent weeks.

The helicopters violated the border in the area of Lowara Mandi, 40 km (25 miles) west of Miranshah, the main town in the North Waziristan tribal region, at around 9 p.m. on Sunday, the official said, speaking on condition of anonymity because of the sensitivity of the subject.

There was no official confirmation.

"We don't have any information on border violation by the American helicopters," Major Murad Khan, a military spokesman, said.

Residents said drones had been flying overnight and early on Monday over Miranshah but did not attack.

"It's really so scary, we just can't sleep when you hear them flying," said Zia-ur-Rehman, a resident of Hamzoni village near Miranshah.

Relations became strained between the allies in the war on terrorism after U.S. commandos raided a border village in South Waziristan and killed 20 people, including women and children, on September 3.

Pakistanis were outraged by the raid and the six-month-old civilian government issued a diplomatic protest.

It was the first overt incursion by U.S. ground troops into Pakistani territory, though the U.S. military has conducted numerous missile strikes against al Qaeda and Taliban targets in Pakistan's tribal lands.

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The U.S. action prompted army chief General Ashfaq Kayani to issue a statement saying that foreign troops would not be allowed on Pakistani soil and Pakistan's sovereignty and territorial integrity would be defended at all costs.

Pakistani troops fired on two U.S. helicopters that crossed the border at the same village, Angor Adda, a week ago, again forcing them to turn back, according to residents and security officers.

Pakistan and the United States issued denials.