Former chief of Moscow's subway, Dmitry Gayev, has died at the age of 61, his lawyer reported on Sunday.

      Gayev died in one of the hospitals in Switzerland after a long illness, at the age of 61. The exact cause of his death is not announced yet.

      Dmutry Gayev was born in 1951 in Moscow. In 1973 he graduated from the Moscow Istitution of Railway Transport, in 1986 - from the Moscow Institution of Management.

      Gayev managed the Moscow rapid transit system for more than 15 years. About 24 undeground stations were built for that time, together with emergency call columns and new types of turnstiles.

      In 2011 he was accused of misappropriating 112 million rubles ($4 million) in illegally patenting the electronic subway tickets. Gayev was forced to resign after allegations of fraud and embezzlement came to light.

      On Sunday, Gayev's lawyer Alexander Asnis said that, despite the tragic news about his client's death, Gayev’s lawyers would seek the termination of criminal proceedings against him.