Another official killed in North Caucasus
Also, one person has died in hospital from injuries they received on Friday during an attack on a police checkpoint near Ingushetia's largest city, Nazran.
In Chechnya, at least three policemen were injured in a suicide bomb attack in the capital, Grozny.
And in neighbouring Dagestan, four militants were killed in a shootout with special forces. Authorities say a terrorist ringleader was among the dead.
In recent months, Russia's southern republics have seen a surge in violence, despite a crackdown on militants.