U.S. military officials say wanted terrorist Abu Musab al-Zarqawi recently escaped capture by U.S. troops in Iraq, but he left behind several key pieces of intelligence.

A covert military unit tasked with finding the leader of Iraq's insurgency says Zarqawi jumped from a moving vehicle near a checkpoint on February 20, not far from the western city of Ramadi.

Troops gave chase and stopped the vehicle, which they say contained the terrorist leader's laptop computer and about $100,000 in euros. At least one Zarqawi associate was arrested.

U.S. Defense Secretary Donald Rumsfeld told reporters in Washington Tuesday that Zarqawi's network may be small, but is very lethal and has carried out a large number of attacks.

The United States is offering a $25 million reward for Zarqawi's capture.