A US drone strike in Pakistan's northwestern Shawal Valley has killed at least five militants, three Pakistani intelligence sources said on Tuesday.
Monday night's strike in the Zwy-Naray area of North Waziristan, a mountainous region bordering Afghanistan, follows a build up of Pakistani forces in the area and another drone strike on Saturday.
The deep, forested ravines of Shawal Valley are dotted with Taliban bases and are a key smuggling route into Afghanistan. The valley runs across South and North Waziristan, most of which are under the control of the Pakistani military.