According to the director of the FSB, Russia’s security service, 11 people might be arrested. Among them are 4 suspects who are said to be directly involved in the attack. This was reported by the Kremlin press service.
According to the FSB, the 4 suspects arrested this morning were on their way to the Russian-Ukrainian border and are said to have had contact with people in Ukraine. Images of the arrest of several suspects are now circulating on the internet, but it is not clear whether the images are authentic and show the real perpetrators.