Three attackers shot dead a policeman outside his home in Dagestan on Sunday night, then killed his daughter and wounded his wife after the pair came out to investigate the noise, a police spokesman said Monday.
The assailants escaped, and the wife was hospitalized in critical condition, the spokesman said.
In Ingushetia, a policeman was killed and another hospitalized in a drive-by shooting Sunday night, police said.
Authorities were hunting for the suspects.
Meanwhile, law enforcement officers have detained a leading rebel warlord in Ingushetia, Issa Khashagulgov, who has been on a federal wanted list since 2004, RIA-Novosti reported, citing a statement by the Federal Security Service.
No additional details were provided.