Pakistani soldiers battled Taliban fighters near the Afghan border on Sunday in an attempt to recover sensitive material from a downed US drone.
The Taliban claimed that they shot down the unmanned aircraft that crashed on Saturday night near Jangara village in the South Waziristan tribal area.
Taliban guerillas collected the debris but intelligence officials said that Pakistani soldiers subsequently managed to take it from them.
However Taliban commander Azmatullah Diwana claimed that his men had fought off the soldiers. The army then sent helicopter gunships into the area, Mr Diwana said by telephone from an undisclosed location.
Nawab Khan, a government official in South Waziristan, confirmed the drone crash and the subsequent clash between militants and army troops. But he did not know whether the soldiers were successful in recovering the remains of the drone.