A car bomb has killed at least two police and injured seven other people in Russia's North Caucasus, a Dagestan province police spokesman said.
The spokesman said a car blew up as it approached a police post about 100km north of Dagestan's capital Makhachkala.
The blast came a month after twin bombings blamed on female suicide attackers from Dagestan killed 40 people on Moscow's metro on 29 March 29.
The Moscow bombings were followed by several deadly attacks in the North Caucasus, including two suicide blasts that killed 12 people, mostly police, in Dagestan on 31 March.
