Russian media reported that a gunman opened fire with a hunting rifle on churchgoers leaving a service in the town of Kizlyar.
Five women were shot dead in an apparent terror attack on an Orthodox church in the North Caucasus region of Dagestan on Sunday, officials and local media said.
According to local press reports an unidentified gunman fired at worshippers at an Orthodox church in the town of Kizlyar in the mainly Muslim region.
"An unknown man opened fire with a hunting rifle in Kizlyar, fatally wounding four women," the regional internal affairs ministry said in a statement.
A fifth woman died of her injuries in hospital, health ministry spokeswoman Zalina Mourtazalieva told TASS news agency.
Two Russian police officers were injured in the attack.
The attacker was "eliminated" by police fire, the regional internal affairs ministry added.
According to a local official. the assailant was a local man in his early twenties, the Interfax news agency reported.
The Russian RBK daily quoted an Orthodox priest saying the attacker had opened fire on churchgoers following an afternoon service.
Dagestan, bordering Chechnya, is one of the poorest and most unstable regions of Russia.
Militants from the region, which lies immediately east of Chechnya, are known to have travelled to Syria to join Daesh.
In 2015, Daesh declared it had established a "franchise" in the North Caucasus.
It has claimed a number of attacks on police in Dagestan in the last couple of years that have involved guns and explosives, as local security forces battle a simmering insurgency.
Sunday's shooting comes exactly one month before the March 18 presidential election that Vladimir Putin is almost guaranteed to win.