An investigator was killed late on Tuesday in Makhachkala, the capital of the Russian North Caucasus republic of Dagestan, Russia's Investigative Committee reported on Wednesday.
A source in Dagestan's law enforcement agencies said investigator Gadzhi Alibegov, who was shot dead when he got out of his car near his home, had mainly dealt with cases involving extremism.
An investigation is underway.
More that a decade after the end of a federal war against separatists in Russia's North Caucasus republic of Chechnya, Russian security forces continue to fight militants, who stage frequent attacks on security forces, police and civilians, in other regions in the area, including Dagestan.
