The U.S has carried out a flurry of drone strikes recently after a lull, and officials are trying to determine whether the latest hit killed al-Qaida's second-in-command. Here is a look at drone strikes over the past month and the tolls from them, according to Pakistani intelligence officials.
Eight suspected militants killed in a strike that hit a house in the Dra Nishtar area of North Waziristan
Four suspected militants killed in strike on a compound in Datta Khel Kalai village in North Waziristan.
Strike on militant hideout kills 10 suspected militants near Mir Ali in North Waziristan.
Four suspected militants killed in hit on bakery in Miran Shah in North Waziristan.
Five suspected militants die in strike on a vehicle and house close to Datta Khel in North Waziristan.
Strike on a motorbike near Wana in South Waziristan kills two suspected militants.
Ten suspected militants killed in strike in Mana Raghzai village in South Waziristan.
Strike on a house near Mir Ali in North Waziristan kills eight suspected militants.