At least 13 people were injured in a series...
The first blast was carried out by a suicide bomber, who set off an explosive device when he was stopped by security guards at the gates of a police station, killing two police officers and injuring another four.
The second bomb, which was in a VAZ 2112 car stolen in the Ukrainian region of Donetsk and parked opposite the police station in Karabulak, was activated by an unidentified person from a distance. The blast, equivalent to 50 kg TNT, occurred when an investigative group was inspecting the scene.
"As a result of a first explosion two police trainees were killed and another four injured," the spokesman said. "After the car explosion nine people were injured - seven police officers, the deputy prosecutor of the Karabulak police and one civilian."
On March 29, two deadly blasts occurred in two Moscow subway stations claiming some 40 lives and injuring dozens more. The attackers struck the Lubyanka and Park Kultury stations during the morning rush hour.