PARIS-An Egyptian national has been detained in the Paris suburbs in connection with last year's deadly train bombings in Madrid, police sources said. The suspect, identified as 33-year-old Ahmed E., was placed in preventive detention and was to be interrogated by French counterespionage agents about his ties with a prime suspect in the attacks. That suspect -- Rabei Osman Sayed Ahmed, nicknamed "Mohamed the Egyptian" - was arrested in Italy last year and later extradited to Spain. Sources close to the French probe said Ahmed E. might have given his countryman a place to stay outside Paris, and investigators are trying to determine the exact nature of the ties between the two men.