A suicide bomber and two accomplices were killed while attacking a police station in the southern Russian region of Stavropol on Monday, the Interfax news agency reported.
The attackers were unable to enter the police station, and no police or civilians were injured during the attack, the report said, citing the local police press service.
"During the attempted attack, two were killed and one managed to perpetrate a suicide bombing," the press service was quoted as saying.
The bombing damaged part of the police station, in the town of Novoselitskoye, and security forces across the region were placed on high alert, Interfax reported.
The region is located in the northern tip of Russia's North Caucasus Mountains, where authorities have struggled with a homegrown Islamist insurgency for decades.