China, March 02 (ANI): Chinese police carried out investigative work after an attack at a train station on Saturday which killed at least 33 people and injured more than 130 in southwest China. Official state-run news agency Xinhua described the incident as an "organised, premeditated violent terrorist attack". Police shot dead four of the attackers and detained one, Xinhua said, while approximate five others are on the run. Chinese state broadcaster CCTV showed footage of local police carrying out investigative work in the aftermath of the incident as onlookers watched cautiously from a distance. CCTV also showed police wrapping a long, sword-like knife in a plastic bag, amid heavy security at the station. China blamed militants from the restive far western region of Xinjiang on Sunday for the attack