Putin detains 11 for Moscow attack; IS claims responsibility
Russian President Vladimir Putin announced the detention of 11 individuals involved in the attack on a Moscow concert hall that killed 115 people. The Islamic State group's Afghanistan branch claimed responsibility. The attack occurred days after Putin's electoral victory and amid the ongoing conflict in Ukraine. The UN Security Council condemned the attack, and global support for the victims poured in. Putin extended his presidency amidst heightened security measures.