Terrorist attack near Moscow kills 40, injures 145

At least 40 people were killed and 145 wounded in a terrorist attack near Moscow. Gunmen opened fire at a concert venue, causing chaos and a fire outbreak. Isis claimed responsibility. Russian authorities evacuated 100 people from the basement. The attackers threw explosives, triggering a massive blaze. The Kremlin tightened security measures. The US embassy had previously warned of imminent extremist attacks in Moscow.