In Russia, at least three people have been killed by a car bomb in the North Caucasus republic of Dagestan. Police say at least three other people were injured when the bomb went off by a cafe in the town of Khasavyurt. The militants are suspected of being behind this week's attack on Moscow's Domodedovo airport which killed 35 people. Police spokesman Magomed Tagirov said all those killed in Khasavyurt had been inside the Karavan cafe when the blast struck. A spokesperson for the town's main hospital told Russia's Interfax news agency that the dead were all civilians.Meanwhile, Russians is today paying last repects to the victims of this week's suicide bombing at Domodedovo Airport in Moscow. 35 people were killed and 168 wounded in the attack. No one has claimed responsibility for the blast so far. Russian Prime Minister Vladimir Putin says the early investigation shows no connection to Chechen extremists. The Russian President Dmitry Medvedev fired the head of the central Russian transport district, Andrei Alexeyev, for security lapses. He said more firings could be possible.