WASHINGTON -- Homeland Security chief Tom Ridge said Sunday there was nothing new in a statement attributed to al-Qaida that threatens new attacks in New York and Washington unless America stops supporting Israel and converts to Islam.

"The threats contained in that piece are the same threats we've been hearing now for the past year," Ridge told "Fox News Sunday." "It's just added to the totality of the threat environment within which we're working but we don't add any special credence to it other than we know we're at war. The war on terrorism has come to our shores. We have to deal with it."

A correspondent for the Arab satellite TV station Al-Jazeera told The Associated Press that he received the unsigned, six-page document Wednesday, a day after the station broadcast an audiotape believed to be made by al-Qaida leader Osama bin Laden.

The United States and other governments blame bin Laden for the attacks that destroyed the World Trade Center in New York and damaged the Pentagon in Washington, killing more than 3,000 people on Sept. 11, 2001.

The Arab TV correspondent, Yosri Fouda, who is known for good contacts within al-Qaida, would only say that the statement came from his sources with the group.

Ridge said the Bush administration was uncertain of the source of the letter.

"We're familiar with that piece of information. There are no new threats," he said. "There are the same old conditions. It's just part of the continuing threat environment that we assess. It's really nothing new."

Meanwhile, a senior Bush administration official confirmed Sunday that Ridge is President Bush's choice to head a new Department of Homeland Security. The Senate is expected to pass legislation this week to create the department; the House has already voted in favor of it.

Ridge, whom Bush tapped shortly after the Sept. 11 attacks to coordinate homeland security efforts, declined to discuss his expected appointment, telling ABC's "This Week" he would "be privileged to serve the president wherever he thinks I can serve him best."