6 June 2012 Last updated at 08:44 ET
There have been eight US drone strikes in Pakistan over the past two weeks
US Defence Secretary Leon Panetta has backed the use of drones to target militants in Pakistan, two days after a missile strike reportedly killed al-Qaeda leader Abu Yahya al-Libi.
Mr Panetta said the US had made it "very clear that we are going to continue to defend ourselves".
He made the comments while attending a conference in neighbouring India.
On Tuesday, Pakistan summoned the US charge d'affaires to reiterate its "serious concerns" about drone strikes.
There have been eight US drone strikes in the past two weeks despite Islamabad's demands for them to be stopped.
Pakistan says the drone attacks fuel anti-US sentiment and claim civilian casualties along with militants. The US insists the strikes are effective.
US officials say Abu Yahya al-Libi died when two missiles struck a suspected militant compound early on Monday in Hesokhel, a village to the east of Miranshah, the main town of the North Waziristan tribal area.
US Defence Secretary Leon Panetta has backed the use of drones to target militants in Pakistan, two days after a missile strike reportedly killed al-Qaeda leader Abu Yahya al-Libi.
Mr Panetta said the US had made it "very clear that we are going to continue to defend ourselves".
He made the comments while attending a conference in neighbouring India.
On Tuesday, Pakistan summoned the US charge d'affaires to reiterate its "serious concerns" about drone strikes.
There have been eight US drone strikes in the past two weeks despite Islamabad's demands for them to be stopped.
Pakistan says the drone attacks fuel anti-US sentiment and claim civilian casualties along with militants. The US insists the strikes are effective.
US officials say Abu Yahya al-Libi died when two missiles struck a suspected militant compound early on Monday in Hesokhel, a village to the east of Miranshah, the main town of the North Waziristan tribal area.