World Bulletin / News Desk
Police claim one of the suspects, speaking in Arabic, said he had "put the bomb on five minutes".
Arabic-speaking witnesses later informed the police after the pair left the subway.
The train was stopped and searched at Reumannplatz station but no suspicious persons or objects were found.
Police say the suspects are both male, one around 30-35-years-old and "probably of Arabic origin"; the other is described as being between 50-to-55-years-old, brown haired and speaking Arabic.