A lone captive of the war on terrorism arrived here Saturday but U.S. military officials refused to say whether it was Abu Zubaydah, the most senior al-Qaida figure in U.S. custody.

The man arrived early Saturday morning in good medical condition, said Maj. James Bell, a spokesman overseeing the detention mission here.

Bell refused to give any other details about the man or on where he had been brought from but said he required no immediate medical attention.

None of the other 299 detainees here arrived here alone. They all were flown in on military transport planes that take more than 24 hours to reach here from Afghanistan.

Defense Secretary Donald H. Rumsfeld has said Zubaydah — captured in Pakistan with about 50 other terrorism suspects — has received medical attention for three bullet wounds he sustained in Pakistan.

Rumsfeld has refused to say where U.S. authorities have been holding Zubaydah, the highest ranking lieutenant of Osama bin Laden taken alive in the U.S.-led war on terrorism. He has, however, dismissed speculation that Zubaydah would be moved to another country where authorities could exact harsher methods of interrogation.

There was no immediate comment from the Pentagon on Saturday's arrival, which brought the total number of captives at this base in eastern Cuba back up to 300.