At least 10 people have been killed in a missile strike in the south Waziristan tribal region of Pakistan bordering Afghanistan, witnesses have said.
The missile hit a house killing suspected fighters and civilians.
Wednesday's attack took place near the Kaloosha village.
Sources in Peshawar said that least 10 people were killed. Some of the dead have reportedly been identified as Arabs.
"The blast shook the entire area, about eight people were killed," Behlool Khan, a resident of the area, said.
Pakistani authorities have not confirmed the report.
'US missile'
A security official said he believed the missile was fired by US forces, who are operating in Afghanistan.
The US military have fired missiles on the Pakistani side of the border several times in recent years, most recently in late January when Abu Laith al-Libi, one of Osama bin Laden's top lieutenants, was killed.
That missile was believed to have been fired by a US pilotless drone.
However, neither US nor Pakistani authorities officially confirm US missile attacks on Pakistani territory.
It can be considered an infringement of Pakistani sovereignty.
PHOTO CAPTION
Map of Pakistan locating Waziristan.
Al-Jazeera