Pakistan extended the deadline, until Monday, for foreign fighters and al Qaeda militants, holed up in the mountains bordering Afghanistan, to give themselves up and register with officials.
"We hope this issue will be resolved soon," Asmatullah Gandapur, administrative head of South Waziristan tribal region, said on Saturday after the earlier deadline passed overnight.
Tribes in the mountains bordering Afghanistan are thought to be sheltering between 500 and 600 foreign fighters in the area.