The website of the North Caucasus insurgency says the suicide bombing of the police department in Nazran, Ingushetia, on August 17 was carried out by Said Abu Saad al-Buryati, RFE/RL's North Caucasian Service reports.
Buryati, or Said Buryatsky, also known by his legal name, Aleksandr Tikhomirov, was an ethnic Buryat from the capital of Russia's Republic of Buryatia, Ulan-Ude, in Siberia.
He joined the Chechen insurgency two years ago and was considered the main spiritual leader of the rebels in the North Caucasus.
Moscow-backed Chechen President Ramzan Kadyrov publicly called Said Buryatsky his personal enemy.
In a video published on the kavkazcenter.com website, Buryatsky is shown sitting next to a large apparent bomb in a car, explaining his intention to carry out the suicide attack against the police department in Nazran.
The footage also shows the moment of the attack.
At least 20 people, mainly police officers, were killed and dozens injured in the terrorist act. Buryatsky's online lectures on Islam have been banned in Central Asian countries as "Wahhabi propaganda."