DOHA, October 18 (IslamOnline.net & News Agencies) - Washington’s most wanted man Osama bin Laden threatened Saturday, October 18, to send bombers to the United States and to attack any forces joining the U.S.-led coalition in Iraq, according to two new audio tapes.

Qatar-based al-Jazeera Satellite all-news Channel quoted al-Qaeda chief as saying, "We will go on fighting you and we will carry on martyrdom operations in and outside the United States until you stop being unjust," in an audiotape titled "message to the American people".

"We reserve the right to retaliate at the proper time and place against all countries that take part in this unjust war (against Iraq), namely Britain, Spain, Australia, Poland, Japan and Italy," announced the taped voice of Bin Laden, claimed by the U.S. to be the mastermind of the September 11, 2001 hijackings in New York and Washington.

"Islamic countries that take part will not be excluded. This applies particularly to the Gulf states, chiefly Kuwait, (which served as) launchpad for the crusader forces."

Al-Jazeera did not give a date for the recording of the audiotape, but a second "message to the Muslim Iraqi people" also aired by the channel referred to "the government of Mahmud Abbas," the Palestinian Prime Minister who stepped down on September 6, indicating the tape was recorded before then, said Agence France-Presse (AFP).

In the message to Iraqis, Bin Laden hailed their "jihad," or holy war, against the American occupiers, paying tribute to the "heroes" in Baghdad, Baqubah, Mosul and al-Anbar province, areas where U.S. troops regularly come under attack.

In a clear incitation against Arab regimes, viewed by the West as moderate, Bin Laden called on the “peoples not to obey those who call for peaceful solutions and prevent Jihad”.

In what could be a reference to the U.S.-picked Iraqi Governing Council, al-Qaeda leader attacked those who join “legislative councils that do not abide by Sharia (Islamic code), adding “those who support the U.S. are no longer considered Muslims”.

He also praised "Ansar al-Islam, the descendants of Saladin," in a reference to the Iraqi Kurdish Islamic group which the United States accuses of links with al-Qaeda.

The speaker also called on "Muslim youths everywhere, especially in countries neighboring (Iraq) and in Yemen," to "roll up their sleeves" and join the jihad.

He said the United States had become "bogged down in the quagmires of the Tigris and Euphrates," and was reduced to "begging for mercenaries from east and west" to join its forces in Iraq.

Bin Laden's whereabouts have been unknown since the United States launched a military campaign against Afghanistan in October 2001 and toppled his Taliban hosts in a hasty retaliation for the September 11 attacks.

On the eve of the second anniversary of 9/11, al-Jazeera aired a videotape showing Bin Laden and his second in command Ayman al-Zawahiri - Egyptian - in an "undetermined mountain area" and said it had probably been recorded toward the end of April or in early May.

Al-Jazeera showed on screen a still picture of a gray-bearded and tired-looking Bin Laden seated against rocks taken from the video as the audiotape ran Saturday night.