Russian security forces say they’ve carried out a special operation against militants in the North Caucasus republic of Dagestan.
Reports say four militants and two officers have been killed.
The operation, which has now ended in the capital Makhachkala, targeted a house where it’s thought rebels were staying. The militants are said to have opened fire and tossed grenades.
An Islamist insurgency is raging in the mainly Muslim region, where rebels want to free themselves from Russian rule.
During the operation a suicide bomb attack wounded more than two dozen people and killed the bomber. He blew himself up as he approached police guarding a site which had seen a battle hours earlier.
On the same day at least 12 people were reported killed in separate shoot-outs across the North Caucasus. They included a school principal gunned down in her home.
Attacks against teachers and imams have become more frequent in the region.
The North Caucasus has become more unstable since two wars fought by Russia in Chechnya in the 1990s.