A Kuwaiti activist says the first of 12 Kuwaitis captured by U.S. forces in Afghanistan and held at a U.S. military prison at Guantanamo Bay, Cuba, has returned home after three years in captivity.

The head of a committee seeking the release of the detainees said the man, Nasser al-Mutairi, arrived in Kuwait City early Sunday aboard a plane sent by the Kuwaiti government.

The United States designated more than 600 people captured in Afghanistan as enemy combatants. Most have been held without charges, legal representation or trials. About 200 have been released.

Families of the Kuwaiti detainees said the men were doing charity work in Afghanistan when they were captured in the U.S.-led war against the Taleban and al-Qaida after the 2001 terror attacks in the United States.

Some information for this report provided by AP and Reuters.