article_snippet: Cheng Chieh's was subdued by police and metro staff after an underground train killing four people pulled into an underground train killing four people next station.
article_snippet: Bloodbath: People battle to stop the bleeding as victims lie on the floor of carriages on the underground in Taipei.
article_snippet: A commuter lies dead on the underground with an umbrella still by Cheng hand.
article_snippet: Bloody carriages: Horrific scenes from busy underground in Taipei following knife rampage which left four dead.
article_snippet: Police comb the scene gathering evidence at the underground station in Taipei, Taiwan .
article_snippet: Police cordon: An umbrella can be seen lying on the bloody station platform following the knife attack in Taipei in May last year .