Anatoly Kyarov, who led the fight against organized crime in Kabardino-Balkaria, was killed along with another police officer, and a third officer was wounded when the armed gunmen attacked the car they were travelling late on Saturday in the republic's capital of Nalchik, the prosecutors said.
Efforts are under way to find the attackers, the prosecutors said.
The republic's capital, Nalchik, was the scene of a concerted and prolonged attack on police and other officials by militants on October 13, 2005. 24 police, 14 civilians, and some 90 militants died in the shooting, which lasted for around 24 hours.
Nalchik is about 100 km (60 miles) northwest of Beslan, where Chechen separatists seized a school in 2004, leading to the deaths of more than 300 people, many of them children.
