Security forces killed on Monday a senior Dagestani rebel, officials said, the fourth such victory for Moscow in two months.
Gadzhiyav Gaziyev was shot dead in Dagestan along with another insurgent in a gunfight between the militants and law enforcement agents, the National Anti-Terrorism Committee said.
"On Monday, a criminal implicated in many murders and attacks on the lives of civilians and members of law enforcement agencies was killed," anti-terrorism committee spokesman Nikolai Sintsov said in a statement carried by Interfax.
Last week, the committee said al-Qaida's top emissary in the North Caucasus and Dagestan's top rebel leader were killed in separate incidents.
In March, security forces killed Supyan Abdullayev, a senior aide to North Caucasus warlord Doku Umarov, during a raid on a suicide-bomber training camp in Ingushetia.