MAKHACHKALA, Russia Unknown gunmen sprayed a police post in the violence-afflicted southern Russian province of Dagestan with gunfire on Wednesday, killing two policemen, officials said. The attackers drove up in a car to the roadside post where five policemen were on guard before opening fire and making their escape, said the region's deputy interior minister, Magomed Ismailov. Dagestan neighbors Chechnya, where a separatist conflict has raged for most of the past 12 years. Despite the end of large-scale fighting, daily attacks continue and the violence has increasingly spread across the rest of Russia's impoverished and mainly Muslim North Caucasus.