One person was killed and 61 injured in twin blasts in Dagestan's capital Makhachkala on Thursday, a police source said.
According to the last report, one person died with another 61 injured.
Earlier figures said 21 people were injured when two car bombs went off shortly after midnight near the city's central square, with an interval of some 15-17 minutes. The second blast targeted a police convoy which rushed to the scene of the first explosion.
A total of 44 police were injured in the blast, other victims are civilians. Two people, one of them a police officer, are in critical condition.
More that a decade after the end of a federal war against separatists in Chechnya, militants continue to stage frequent attacks on security forces, police and civilians, in other regions in the area, including Dagestan.