The US government's global manhunt has thwarted two terrorist attacks since September 11th and found evidence of several other plots, according to US officials.
Evidence seized in raids in the United States and in Europe included plans or materials for an attack on the US embassy in Paris and an attack with explosives on a military site in Brussels, the officials said.
The US police and intelligence officials said about two dozen arrests had been made across Europe of people suspected of being involved in planning those attacks.
The arrests came in a global manhunt led by the FBI and aided by CIA intelligence that has produced dozens of raids and searches in the last two weeks.
Information about the overseas attacks first emerged this summer, well before the September 11th hijackings, when authorities captured an alleged associate of Osama bin Laden, and he began co-operating, officials said.
The alleged bin Laden associate, Mr Djamel Begal, provided overseas authorities with information about possible targets and the names of others who might be involved, according to officials.
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