Tamerlan’s buddies?

Makhachkala, Dagestan (CNN) — At least four people are dead and 44 are injured after two bombs exploded Monday in Russia’s volatile North Caucasus region, the Ministry of Health’s website says.

Thirty-one of the injured were hospitalized, it says.

The incident — which occurred in Makhachkala, capital of the semi-autonomous republic of Dagestan — also caused significant damage. Security officials say they believe law enforcement officers may have been the target because the explosion occurred outside a local marshal’s building.

One car bomb was discovered by a police patrol, who called in a unit to defuse it. Before that could be done, the bomb went off, but the explosion was minor, security officials said. Then, as a crowd of people gathered, a second, more powerful device detonated, causing the casualties.

An Islamic insurgency has taken hold in the North Caucasus and there is a strong presence of Islamic militants fighting Moscow’s rule.