The US says a man suspected of planning twin terror attacks in Kenya in 2002 has been transferred to its detention camp at Guantanamo Bay.
The Paradise Hotel was popular with Israeli tourists in Mombasa
A Pentagon spokesman said Abdul Malik was arrested in East Africa and admitted a role in the Mombasa attacks.
A suicide attack on a Mombasa tourist hotel frequented by Israelis killed 15 people in November 2002.
An Israeli airliner leaving Mombasa was targeted by a missile attack shortly afterwards, but not damaged.
The spokesman said Mr Malik was transferred into Guantanamo Bay at the weekend.
He will have a combatant status review at Guantanamo Bay to determine whether the US is legally allowed to detain him at the camp without charge.
There are now approximately 385 detainees at Guantanamo Bay, the Pentagon said.
Pentagon spokesman Bryan Whitman said Abdul Malik was captured as part of an ongoing conflict with al-Qaeda and was involved in terrorist attacks in East Africa.
"Due to the significant threat that this terror suspect represents he has been transferred to Guantanamo," he added.
The spokesman offered no details about how Abdul Malik was captured, how he came into US custody or his nationality.
"Success in the global war on terror requires us to work closely as well as quietly with many of our allies in the region," Mr Whitman said.
Khalid Sheikh Mohammed, the alleged al-Qaeda mastermind of the 9/11 attacks, was reported earlier this month to have told a US military tribunal that the Mombasa attacks were among 31 plots he was involved in before his capture.
A Kenyan trial of three men suspected of conspiracy over the Mombasa attacks collapsed in 2005.