The number of people killed after a rush-hour subway derailed in Moscow has risen to 20, according to Russian news agency Itar-TASS, quoting emergency officials.
Russia's emergencies ministry (EMERCOM) reported that over 1,000 people had been evacuated from the scene.
Investigative Committee spokesman Vladimir Markin ruled out the possibility that it was related to terrorism, saying: "There are no signs of a terrorist attack, so most likely it is an industrial accident".
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British Airways said it was taking the matter "extremely seriously" and is assisting police with their enquiries.
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