Low quality works on installing track switch have caused train derailment in the Moscow metro, Russian Investigative Committee spokesman Vladimir Markin told Interfax.
"Investigators believe that since late May 2014 preparatory works, on putting track switch to launch a new section, started at the section between Park Pobedy and Slavyansky Boulevard stations. Investigators think that the works were held inappropriately - track switch was secured with an ordinary 3-mm wire, which ruptured. This led to train derailment, death of 21 passengers and infliction of different bodily injuries to over 150 passengers," Markin said.
A range of technical, chemical and other tests is being carried out in the framework of the criminal case opened under the Russian Criminal Code Article 263.1 and their results will allow determining all circumstances of the accident, the spokesman said.
Investigators also check whether contractors and sub-contractors held licenses for carrying out relevant works in the Moscow metro, Markin said.
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