Former Guantanamo Bay inmate killed in Yemen by escalating US airstrike campaign

Yasir al-Silmi died alongside, Usayd al-Adnani, an emir with al Qaeda in the Arabic Peninsula, the Pentagon says

Since the beginning of the conflict in Yemen in 2015, around three million people have been forced to flee their homes for safety (Getty)

A former Guantanamo Bay detainee was killed by a US airstrike on Yemen, as an American bombing campaign targeting one of al Qaeda's strongest branches struck more targets in the country over a week than it had in any previous year.

Yasir al-Silmi died alongside, Usayd al-Adnani, an emir with al Qaeda in the Arabic Peninsula (AQAP) within the Abyan governorate, the Pentagon said.

Mr al-Silmi, a Yemeni citizen, spent several months in extrajudicial detainment at the Cuban naval base after being apprehended in Pakistan. But he was repatriated to his homeland in 2009.

"More than 20 strikes targeted AQAP militants, equipment and infrastructure," said Pentagon Spokesman, Captain Jeff Davis.

He added that they would "degrade the AQAP's ability to coordinate external terror attacks and limit their ability to use territory seized from the legitimate government of Yemen as a safe space for terror plotting."

He said: "Targets of the strikes included militants, equipment, infrastructure, heavy weapons systems and fighting positions."

The strikes follow a January raid in which 30 Yemeni civilians lost their lives, including 10 women and children, as helicopter gunships bombed militants as they fought with US Navy Seals.

The US considers the group, also known as Ansar al-Sharia, to be the most active and dangerous of the various Al-Qaeda splinter organisations.

Although it has not yet launched any successful attacks in the West, AQAP is responsible for the deadliest terror attack in Yemeni history, killing 120 military personnel with a suicide bomb in 2012.

The civil war pitting rebels led by the Houthi Shiites against a Sunni coalition government backed by Saudi Arabia and the United States has enabled AQAP to seize significant swathes of territory.

For some time it had control of the strategic port city of Mukalla and reportedly seized some $120 million from the city's bank.

American Special Forces helped oust AQAP from Mukalla in 2016, but the group remains the most powerful third party in the conflict.

The US' main involvement in the war has been supplying bombs to the Saudi-led coalition, although it has also fired directly on the opposition, who are demanding more political power and autonomy for the Shiite religious autonomy.

Over 10,000 people have died in the conflict, including 4000 civilians. US-made bombs have repeatedly been used to kill civilians in unlawful airstrikes against Yemeni citizens, according to Human Rights Watch (HRW).

The organisation said it was an American bomb which killed 140 people, mainly civilians, in a highly-publicised airstrike on a Houthi funeral last year.

The US approved more than US$20 billion in military sales to Saudi Arabia in 2015 alone, even as the powerful Gulf state has been accused of "deliberately targeting impoverished Yemen’s farms and agricultural industry", by HRW.

America is now stepping up its own attacks on AQAP, hitting over 40 targets in the last seven days – more than in any previous year.

Pentagon spokesperson Captain Jeff Davies said the group had "taken advantage of ungoverned spaces in Yemen to plot, direct and inspire terror attacks against the United States and our allies."

He added: "We will continue to target AQAP militants and facilities to disrupt the organization’s plot and protect American lives."