Bomb caused Russian train crash that killed 26

Russian officials opened a terror investigation today, saying that a home-made bomb planted on the tracks of the high-speed Moscow-to-St Petersburg route caused a derailment that killed at least 26 people and injured dozens more.

The head of Russia’s Federal Security Service, Alexander Borotnikov, was quoted by the Interfax and RIA Novosti news as saying that an improvised explosive device equivalent to 15 pounds (7 kilograms) of TNT had detonated when the train passed over it on Friday night. Remains of the device were found at the site of the crash, Mr Borotnikov said.