WASHINGTON: Osama bin Laden's spokesman and son-in-law has been captured by the United States, officials said Thursday, in what a senior congressman called a "very significant victory" in the fight against al-Qaida.

Abu Ghaith's extradition to the United States is imminent, and he is expected to be prosecuted in federal court in New York, according to a law enforcement official who spoke on condition of anonymity because he was not authorized to release the information.

Rep. Peter King, the former chairman of the House Homeland Security Committee, credited the CIA and FBI with catching al-Qaida propagandist Sulaiman Abu Ghaith in Jordan within the last week. He said the capture was confirmed to him by U.S. law enforcement officials.

A Jordanian security official confirmed that Abu Ghaith was handed over last week to U.S. law enforcement officials under both nations' extradition treaty. He declined to disclose other details and spoke on condition of anonymity because of the sensitivity of the matter.

"Definitely, one by one, we are getting the top echelons of al-Qaida," said King, a Republican. "I give the (Obama) administration credit for this: it's steady and it's unrelenting and it's very successful."

Abu Ghaith became an international name in late 2001 when he appeared on pan-Arab satellite television urging Muslims everywhere to fight the United States and warning of more attacks similar to those of Sept. 11. In one video, he was sitting with bin Laden in front of a rock face in Afghanistan. A teacher and mosque preacher in Kuwait, he was stripped of his Kuwaiti citizenship after Sept. 11, 2001.

He is identified as a major al-Qaida core official by the New America Foundation think tank in Washington. King said Abu Ghaith was involved in the planning in the Sept. 11 attacks against the World Trade Center and Pentagon.

The Turkish newspaper Hurriyet reported that Abu Ghaith was passing through Jordan, on his way to Kuwait, shortly after leaving Turkey.

The newspaper said that Abu Ghaith was taken into custody more than a month ago at a luxury hotel in in Ankara, the Turkish capital. But Turkish officials decided he had not committed any crime in Turkey, and released him, the newspaper reported.

In Ankara, Turkish officials refused to confirm Abu Ghaith's deportation or his capture in Jordan to The Associated Press. In Amman, the Jordanian capital, a security official said he had no information on the CIA arrest in Jordan.

U.S. intelligence officials in Washington and New York refused to comment on the case.