More than 13 people have been killed and up to 120 others injured as two powerful explosions hit Makhachkala, the capital city of Dagestan in southern Russia, security services report. The first bomb was detonated by a suicide car bomber not far from a police checkpoint on the outskirts of Makhachkala, when the car was stopped for a regular check. The second bomb, which caused most of the casualties, struck when rescuers arrived at the scene 20 minutes later. The blast caused a fire but it was soon extinguished. The combined power of the blasts was equivalent to 60 kg of TNT, according to officials from the National Antiterrorism Committee. The incidents are being treated as terror attacks. RT's Sean Thomas has the details and also RT talks to Doctor Walid Phares, a counter-terrorism adviser to the US Congress.