Published: Oct 04, 2010 10:48 PM EDT
Updated: Oct 03, 2010 4:53 PM EDT

WASHINGTON (AP) - The Obama administration is warning Americans about potential terrorist threats in Europe and urging U.S. citizens to be extra vigilant when they're in public places such as tourist spots and transportation hubs.
      
The State Department on Sunday came out with a travel alert for Europe that advises U.S. citizens living or traveling there to take more precautions about their personal security. The alert is one step below a formal travel warning advising Americans not to visit Europe.
      
U.S. and European security experts have been concerned for days that terrorists may be plotting attacks in Europe with assault weapons on public places, similar to the deadly 2008 shooting spree in Mumbai, India.
      
Meanwhile, Britain's Foreign Office has upgraded its travel advice for France and Germany, warning Britons going to those countries that the threat of terrorism there is high. But Germany's Interior Ministry says there are "still no concrete indications of imminent attacks."

Below is the alert issued Sunday by the The State Department:

"The State Department alerts U.S. citizens to the potential for terrorist attacks in Europe.  Current information suggests that al-Qa’ida and affiliated organizations continue to plan terrorist attacks.  European governments have taken action to guard against a terrorist attack and some have spoken publicly about the heightened threat conditions.

Terrorists may elect to use a variety of means and weapons and target both official and private interests.  U.S. citizens are reminded of the potential for terrorists to attack public transportation systems and other tourist infrastructure.  Terrorists have targeted and attacked subway and rail systems, as well as aviation and maritime services.  U.S. citizens should take every precaution to be aware of their surroundings and to adopt appropriate safety measures to protect themselves when traveling. 

We continue to work closely with our European allies on the threat from international terrorism, including al-Qa’ida.  Information is routinely shared between the U.S. and our key partners in order to disrupt terrorist plotting, identify and take action against potential operatives, and strengthen our defenses against potential threats.

We recommend U.S. citizens register their travel plans with the Consular Section of the U.S. Embassy through the State Department's travel registration website. Travelers may obtain up-to-date information on security conditions by calling 1-888-407-4747 toll-free in the U.S. and Canada, or on a regular toll line at 1-202-501-4444 from elsewhere in the world.

For information on general crime and security issues, U.S. citizens should also consult the Department of State's Country-Specific Information as well as the Worldwide Caution, which can be found on the Bureau of Consular Affairs website. For further information on safety tips while traveling abroad, U.S. citizens should also consult the following website: http://travel.state.gov/travel/tips/tips_1232.html.