Officials in Russia's volatile Republic of Daghestan in the North Caucasus say three suspected militants were killed in a police operation in the district of Khasavyurt.
Four security officers were wounded in the shoot-out.
A special operation to locate other members of the armed group is under way.
In a separate incident in Khasavyurt, law enforcement officers killed another militant on October 9.
Earlier in the day, security forces conducted air strikes against militants groups near Daghestan's capital, Makhachkala.
Russian police said they dropped two bombs on the mountain hideout of an outlaw group.
On October 8, three militants and a police officer were killed in two separate incidents in Daghestan.
Daghestan has become one of the most volatile republics in the majority-Muslim region of North Caucasus in recent years. Islamic insurgents regularly attack officials, police, and military personnel.
Security forces killed seven suspected militants in Daghestan last week.
Based on reporting by Interfax and ITAR-TASS