Osama bin Laden's terrorist network al-Qaida is threatening more suicide attacks against the United States and Britain in retaliation for the U-S led-military action against terrorist targets in Afghanistan.
The White House is dismissing the threat as "propaganda."
In a videotaped message broadcast early Sunday by Qatar-based al-Jazeera television, spokesman Sulaiman Abu Ghaith said the storm of hijacked planes will not stop until airstrikes against Afghanistan end and Palestinian land is liberated.
He also warned U-S and British citizens to leave the Arabian peninsula -- saying the "ground will burn beneath their feet".
He cautioned Muslims in the United States and Britain not to fly in airplanes or live in tall buildings.
President Bush has advised all Americans to live their lives as usual, and not let terrorists create a nation full of fear.
U-S warplanes resumed airstrikes on terrorist and Taleban military targets in Afghanistan Saturday as the Pentagon admits a stray bomb had hit a residential area near the capital, Kabul.
U-S defense officials say a radar-guided "smart bomb" missed its target -- a Taleban helicopter.
Witnesses say four people were killed and eight others injured in the explosion. U-S officials say they cannot confirm those numbers, but say they regret the loss of life.
U-S officials stress that the United States targets only military and terrorist positions and takes great care to avoid civilian casualties.