The Yemen-based branch of al-Qa'ida confirmed today that the group's No. 2 figure, a former Guantanamo Bay prisoner, was killed in a US drone strike.
The announcement, posted on militant websites, gave no date for the death of Saudi-born Saeed al-Shihri.
The confirmation was significant, however, because al-Shihri had twice before been reported dead but the terror group later denied those reports.
His killing is considered a major blow to the Yemen-based al-Qa'ida branch, known as al-Qa'ida in The Arabian Peninsula.
Yemeni security officials said al-Shihri died of serious injuries sustained when a drone strike targeted him in November last year.
Al-Shihri had survived an earlier drone attack, in September 2012, the officials added, speaking on condition of anonymity because they were not authorized to talk to media.
Wednesday's announcement came in a video purporting to show the group's chief theologian, Ibrahim al-Robaish, eulogizing al-Shihri.
In the video, al-Robaish said al-Shihri was hit by the drone while speaking on his mobile telephone in the province of Saadah, north of the Yemeni capital of Sanaa.
The authenticity of the video, which was first reported by the US monitoring service SITE, could not be independently confirmed but it appeared on militant websites commonly used by al-Qa'ida.
Al-Shihri, also known as Abu Sufyan al-Azdi, fought in Afghanistan and spent six years in Guantanamo. He was returned to Saudi Arabia in late 2007 and later fled to Yemen to join the al-Qa'ida branch there.
In one of his last videos, which appeared on the Internet in April, al-Shihri harshly criticized Yemen's neighbor to the north, Saudi Arabia, for its policy of allowing the United States to launch deadly drone strikes from bases in the kingdom.
Washington considers the Yemen-based al-Qa'ida to be the most dangerous offshoot of the terror network after it was linked to several attempted attacks on US targets, including the foiled Christmas Day 2009 bombing of an airliner over Detroit and explosives-laden parcels intercepted the following year aboard cargo flights.
The group made major territorial gains in Yemen last year, following the uprising that forced the country's longtime leader Ali Abdullah Saleh to step down after more than 30 years in power. al-Qa'ida militants and their allies seized several towns and cities in the south of the country before they were pushed back in a months-long, US-aided military campaign by government forces last year.
Yemeni President Abed Rabbo Mansour Hadi, in office since last year, has worked closely with the US in pushing the group back.
An offensive by Yemeni troops backed by US airpower and advisers drove militants out of the southern cities and into mountain hideouts. Airstrikes, believed to be by US drones, have killed a number of key al-Qa'ida operatives.
Yemen is the most impoverished Arab nation. Its long coastline along the Red Sea and the Arabian Sea gives the nation a strategic commercial and military value. Its proximity to the Horn of Africa gives it the additional closeness to al-Qa'ida concentrations just across the waters in Africa.
Yemen's weak central authority, its complex tribal system and the remoteness of some of its regions have proven it to be an irresistible destination for al-Qa'ida militants from across the globe looking for a safer base.
There are no exact figures for the number of al-Qa'ida militants in Yemen, but they are widely believed to be in the hundreds and backed by a vast network of sympathizers in Yemen and abroad.
In 2011, a high-profile US drone strike killed US-born Anwar al-Awlaki, who had been linked to the planning and execution of several attacks targeting US and Western interests, including the 2009 attempt on the Detroit-bound airliner and the 2010 plot against cargo planes.
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