Travel alert issued for U.S. citizens in Europe - CNN.com
"U.S. citizens should take every precaution to be aware of their surroundings and to adopt appropriate safety measures to protect themselves when traveling," the notice from the U.S. State Department said. "We continue to work closely with our European allies on the threat from international terrorism, including al Qaeda."
In addition, thousands of U.S. troops based in Germany were placed under a curfew Friday night and were ordered not to wear their uniforms off base, according to an order obtained by CNN.
News emerged last week that Western intelligence officials were looking at information about a possible "Mumbai-style" attack in cities across Europe, and a British security source said Saturday that intelligence related to such a plot was being looked at very seriously on both sides of the Atlantic.