Alla Akhpolova of the North Ossetian Interior Ministry said the blast killed one police officer and injured three others, the Russian news agency RIA Novosti reported.
"The explosion was so powerful that parts of the car were scatted within a radius of 328 feet," Akhpolova said.
Authorities said the car was driven by a suicide bomber but there was no information on who was behind the attack.
Megyn Kelly: Santa Claus and Jesus are both white men
Video of Victoria’s Secret models trying to 'twerk' hits Instagram