Police in a tense province in southern Russia say gunmen fatally shot two police officers in separate attacks in the space of a half hour. North Ossetia's Interior Ministry says assailants in a car fired at a police post in the province's Prigorodny district, killing one officer and driving away. Shots fired from the same car half an hour later Monday killed a police officer at another location. North Ossetia is in Russia's volatile North Caucasus region. A bombing in the provincial capital Vladikavkaz killed 12 people last month, and the capital's mayor was killed last week. The district where Monday's shootings took place was at the heart of a 1992 territorial conflict between Ossetians and ethnic Ingush.