At least 11 people have been wounded after a female suicide bomber blew herself up in Russia's North Caucasus republic of Daghestan.
Authorities said the bomber blew herself up in a car on May 25 near the Interior Ministry building in the regional capital, Makhachkala.
Investigative Committee officials said an unidentified woman came up to traffic policemen and detonated an explosive.
Those wounded in the blast included six civilians and five police officers, two of whom are in a critical condition.
The attack comes after twin car bombs killed four people and wounded more than 40 others in Makhachkala on May 20.
Daghestan, along with Russia's other volatile North Caucasus republics, continues to experience violence linked to Islamic extremists and organized criminal groups.
Based on reporting by AFP, AP, Interfax, ITAR-TASS