Investigators said the victims were headed to work in two cars from the minister 's apartment in Makhachkala , the region 's capital , when a device at the bottom of one of the vehicles exploded seconds later and caused a fire . It is in the turbulent Caucasus region . The minister suffered from minor injuries . Similar injuries affected his predecessors .
It is in the turbulent Caucasus region . The minister suffered from minor injuries . Similar injuries affected his predecessors .