A pair of suspected U.S. drone strikes killed four al Qaeda militants in Yemen as the United States maintained a heightened security alert in the country and urged all Americans to leave immediately.

Security sources told CNN about the strikes but didn't offer additional details. A Yemeni official said four drone strikes have been carried out in the past 10 days.

None of those killed on Tuesday were among the 25 names on the country's most-wanted list, security officials said.

It is unclear whether the strikes were related to the added security alert in the country after U.S. officials intercepted a message from al Qaeda leader Ayman al-Zawahiri to operatives in Yemen telling them to "do something." The message was sent to Nasir al-Wuhayshi, the leader of al Qaeda in the Arabian Peninsula, the terror group's Yemeni affiliate. U.S. intelligence believes al-Wuhayshi has recently been appointed the overall terror organization's No. 2 leader.

Full Story http://www.cnn.com/2013/08/05/world/...ike/index.html