Pakistan Troops, NATO Helicopters Clash in Border Region

Two NATO helicopters entered Pakistani airspace and triggered a firefight that injured two soldiers, Pakistan’s military said, in a further setback to ties strained by the U.S. raid that killed Osama bin Laden.

Pakistan troops at a border post in the North Waziristan region shot at the aircraft of the U.S.-led force in Afghanistan and were injured in a return of fire, according to an e-mail sent by Inter-Services Public Relations, the press office at Pakistan’s army headquarters in Rawalpindi. The army has lodged a “strong protest” with NATO’s Kabul-based International Security Assistance Force, the statement said. ISAF is aware of the incident and is investigating, spokesman Lieutenant John Harden said by phone.