CAIRO, Egypt -- In a farewell message broadcast Monday on the Arab TV station Al-Jazeera, a man identified as one of the Sept. 11 hijackers said "It is time we kill the Americans in their heartland."

It was the first broadcast of a farewell video attributed to a Sept. 11 hijacker. Another clip from a videotape the station said it recently received shows Osama bin Laden kneeling side by side with a top deputy who proclaimed the terror attacks a "great victory."

It wasn't clear when the tape was made but the appearance of an apparent hijacker in one segment indicated parts were filmed before the attacks on the World Trade Center and the Pentagon.

Al-Jazeera's editor in chief, Ibrahim Hilal, identified the hijacker as Ahmed Ibrahim A. Alhaznawi -- one of four hijackers on United Airlines Flight 93, which crashed in Pennsylvania. Hilal said the hourlong video, complete with narration and graphics, was delivered by hand to the station's Qatar offices a week ago.

"I can't tell you about when the material was made exactly, but it seems very recent," Hilal said, noting the narrator at one point refers to the March 27-28 Arab League summit as coming up shortly.

A U.S. official, speaking in Washington on condition of anonymity, said the man in the tape is believed to be Alhaznawi.