Passengers get off a Eurostar train that reversed from the Channel Tunnel due to a fire alarm at the Gare du Nord train station in Paris, France, Jan. 17, 2015. All services of Eurostar were suspended Saturday due to smoke detection in the Channel Tunnel, Eurostar announced Saturday. All trains were returning to original stations as the Channel Tunnel linking Britain and France was closed until further notice, Eurostar's customer care team said on its Twitter account. (Xinhua/Chen Xiaowei)