Russia`s southern Caucasus have been shaken by two deadly blasts, which killed four people and wounded ten others.
In the Chechen republic, two policemen were killed and seven more injured when an explosion hit a special search operation in the mountainous region.
One of those killed by the blast was police squad commander.
Meanwhile, an overnight blast in Dagestan has left another two policemen dead and three people wounded. The roadside bomb detonated as a patrol car was driving though the city of Kaspiysk.
The blast also damaged a gas pipeline, disrupting the city`s supplies.
Early reports suggest that explosion was equivalent to six kilos of TNT.