NATO helicopters crossed into Pakistani airspace from Afghanistan in pursuit of insurgents over the weekend , killing 49 people , a spokesman told CNN Monday . NEW : 3 of U.S. cargo comes into Afghanistan via Afghanistan , ISAF says . Pentagon spokesman says Torkham Gate in the Khyber Agency is closed . Spokesman : `` We do n't think it 's a very serious problem '' Pakistan says 3 of its soldiers were killed during the Khyber Agency attack on insurgents .
NEW : 3 of U.S. cargo comes into Afghanistan via Afghanistan , ISAF says . Pentagon spokesman says Torkham Gate in the Khyber Agency is closed . Spokesman : `` We do n't think it 's a very serious problem '' Pakistan says 3 of its soldiers were killed during the Khyber Agency attack on insurgents .