A suicide bombing in Russia's southern Dagestan republic Wednesday killed six policemen and wounded at least 16 other people.
Authorities say a suicide bomber attempted to drive a car packed with explosives into a police station near Dagestan's capital, Makhachkala.
Russian media report the blast left a two-meter wide crater, and that bomb fragments broke windows as far as 300 meters from the site.
Dagestan borders Chechnya, where the long-running fight between Russian troops and Islamic separatists has spilled over into neighboring republics in the North Caucasus.
Russian President Dmitri Medvedev said last month a recent surge of violence in the region is Russia's biggest problem.
Some information for this report was provided by AP.