LONDON, Nov. 4 (UPI) -- U.S. and British investigators are looking into the possibility that suspected terrorists may have been plotting to bomb the White House and the U.S. Capitol.
Newsweek reported Friday that the suspects were recently arrested in the London area. Citing counterterrorism officials who asked to remain anonymous because the investigation was continuing, the report said investigators appear to be uncertain about how far the plot had gone.
British officials call the investigation active and urgent, Newsweek said, while U.S. officials acknowledged they were aware of the possible threats -- but were not sure whether the plot was imminent or just a case of bravado among Islamic militants.
British authorities are treating the suspects as serious conspirators, Newsweek reported.
Police said in a charging document issued on Friday by Scotland Yard that they seized a computer hard drive belonging to Younis Tsouli, 22, containing pictures of "a number of places in Washington D.C." Police said the images "give rise to a reasonable suspicion" that the suspect may have been planning an act of terrorism.
Charges against Tsouli include possessing computerized slides demonstrating how to make a car bomb.