11 people have been killed in a Terrorist attack on the metro system in St Petersburg, Russia. Chechen rebels are suspected to be behind the bomb which exploded on a train between the Sadovaya and Sennaya Ploshchad stations with another found and disarmed near the nearby Ploschad' Vosstaniya station. Whether Chechens actually were behind the attack and whether or not they are linked to ISIS (as