Three policemen died in what is believed to be a suicide attack in Chechnya’s Sunzha region, the information centre of Russia's National Anti-Terror Committee said Monday.
Five others were injured when a car bomb exploded in the wee hours of Monday.
Authorities said “one of possible versions is that the explosion was made by a suicide terrorist”.
"Today, at about 0200 (hours) an unidentified explosive went off, causing (loss to) lives. As of 1100 (hours), three police(men) died, and five got injured,” the source said.
The injured have been admitted to hospital.
Russian authorities have launched an investigation into the incident.