Breitbart.com reports: “Russia on Saturday said it had arrested 11 people — including four gunmen — over the attack on a Moscow concert hall claimed by the Islamic State, as the death toll rose to 115.

Russian President Vladimir Putin was yet to comment publicly on the attack and Moscow has not addressed the Islamic State’s claim of responsibility, even as some lawmakers pointed to a possible Ukraine connection.

Camouflaged gunmen opened fire at the packed Crocus City Hall in Moscow’s northern suburb of Krasnogorsk on Friday evening ahead of a concert by Soviet-era rock band Piknik in the deadliest attack in Russia for at least a decade.

Russia’s FSB security service said some of the perpetrators had fled towards the Russia-Ukraine border, adding that the assailants had ‘appropriate contacts’ in the country.

It did not provide further details.

Some Russian lawmakers also pointed to Kyiv, without providing evidence.

‘The main interested party could most likely be Ukraine and its patrons … we can’t rule it out,’ said senior Russian MP Andrey Kartapolov…”