The surge in violence followed a battle on Tuesday in an apartment building in Dagestan , a third region in the Caucasus , and underscored the lingering instability across Russia 's southwestern territory .
Dagestan
Russia
/location/administrative_division/country
Russia
Dagestan
/location/location/contains
Russia
Dagestan
/location/country/administrative_divisions
LOCATION
Dagestan
LOCATION
Caucasus
LOCATION
Russia