sunland, has the white house commented on this? >> reporter: fred, the white house is not commenting on it. they're not even confirming that this drone strike happened. referring all questions to the yemenee government. keep in mind, this operation could have been conducted by the u.s., either by the cia or the pentagon. now, sources in the region confirm they were targeting three well-known operatives, al qaeda operatives in the region linked with a training camp in southern yemen, and they had been closely tracked and watched for some time. now, it's important to note here the u.s. is the only country that has carried out these drone strikes in yemen. for perspective, let's turn to cnn analyst peter bergen on how often the u.s. carries out the drone attacks. >> this is part of a campaign that has been going on since president obama assumed office. there have been 91 drone strikes so far under president obama, and 15 other kinds of cruise missile strikes. so more than 100 taken together, this has cost the group dearly. >> now, inc

sunland, has the white house commented on this?rter: fred, the white house is not commenting on it. they're not even confirming that this drone strike happened. referring all questions to the yemenee government. keep in