Deadly clash between Pakistani, Afghan troops

Pakistani and Afghan forces exchanged fire at their rugged border in their most serious skirmish in years. Pakistan claimed it killed five Afghan soldiers in the fighting Sunday, but Afghanistan said just two Afghan civilians died. Tension has been running high between Afghanistan and Pakistan, its eastern neighbor, over controlling the 2,430-kilometer border and stemming the flow of Taliban and al-Qaida militants that stage cross-border attacks inside Afghanistan. Pakistan's move to fence parts of the disputed frontier has also angered Afghanistan.