According to a media report, Pakistan-based terrorists plotting to carry out Mumbai-style killings in European cities had on their sight landmarks like the Eiffel Tower, the Notre Dame Cathedral in Paris and Berlin's Central Station. The report further says that a German-Pakistani national interrogated at Bagram Air Base in Afghanistan had provided the list of targets. The revealation has prompted US to issue a travel advisory asking its citizens to guard against potential terror threats while in Europe. An estimated 20 British youths were being trained in al-Qaeda run terror camps in Pakistan's tribal areas to be sent to attack European cities.