Police say a car bomb has exploded outside a cafe in the southern Russian republic of Dagestan, killing at least four people and wounding seven more.
"Three dead and seven injured were taken to hospital, one injured person died on the operating table," a medical source told RIA Novosti following the attack in the city of Khassaviour on Wednesday.
Police spokesman, Magomed Tagirov, said that the car had been parked by Khasavyurt's Karavan cafe and that all of the people killed or injured were inside the cafe.
Russia is battling militants in Caucasus where deadly attacks on government and police officials are almost a daily occurrence in Dagestan as well as neighboring Chechnya and Ingushetia.
The Wednesday car bomb followed Monday's bombing at Russia's main airport which claimed the lives of 35 people.
Last March, double bombings carried out by two female bombers on the Moscow metro killed 40 and wounded more than 100, marking the deadliest violence in the Russian capital since 2004. PressTV reported.