The bombs that went off on a railway track in the Republic of Dagestan in Russia's North Caucasus can be seen as the continuation of the recent terrorist attacks in Russia, a high-placed security officer said.
The blasts, with the force of 6 kg in TNT equivalent, occurred in the early hours on Sunday near the Inchkhe station in Dagestan's Karabudakhkent district near the capital Makhachkala, derailing the locomotive and eight carriages of a freight train. No one was hurt in the incident.
"The first results of the investigation into the terrorist act that occurred on the night of April 3-4 have showed that this explosion was the continuation of the terrorist attack by North Caucasus militants launched on March 29," the security officer said.
Russia has been hit by a series of terrorist attacks lately.
On March 29, twin suicide bomb blasts in Moscow's Lubyanka and Park Kultury subway stations occurred during the morning rush hour, leaving at least 40 people dead and dozens injured.
Chechen militant leader Doku Umarov claimed responsibility on Wednesday for the metro attacks, saying in a video message that the attacks were retaliation for operations carried out by federal security forces in the North Caucasus. He also pledged further attacks.
Two more explosions on Wednesday in the town of Kizlyar, near Dagestan's border with Chechnya, killed 12 people and left 29 others injured.
MOSCOW, April 4 (RIA Novosti)