Chechen President Ramzan Kadyrov is doubtful...
The Kavkaz Center website published on Wednesday a letter from Islamist extremists, who claimed responsibility for the bombing, saying that the "operation" was prepared and carried out in line with orders from the Emir of the Caucasus, Doku Umarov.
"There is nothing new in the statements that the train was allegedly bombed on orders from Umarov. Several months ago they also claimed responsibility for the accident at the Sayano-Shushenskaya [Hydroelectric Power Plant]," Kadyrov said.
The August 17 disaster at the Sayano-Shushenskaya plant on Siberia"s Yenisei River killed 75 people and destroyed a turbine hall. The accident also destroyed three hydropower units and damaged the other seven.
The high-speed Nevsky Express train derailed last Friday en route from Moscow to St. Petersburg after a bomb equivalent to 7 kg (15 lbs) of TNT detonated on the track. A second, weaker bomb exploded at the site on Saturday, and is believed to have targeted investigators.