TheStar.com - Afghan ambush on U.S. special forces

The area in eastern Afghanistan is one of the most active, with attacks on coalition bases and troops now almost a daily occurrence. Most attacks involve rockets fired on U.S. bases using crude timers, most of which miss their mark.

It was not immediately clear who carried out Wednesday's attack, but U.S. officials believe Al Qaeda, remnants of the ousted Taliban government and loyalists of renegade rebel leader Gulbuddin Hekmatyar are active in the area.

The groups are believed to have joined forces to attack coalition forces and the U.S.-backed government of President Hamid Karzai.