RT News - December 28, 2017 (17:00 MSK)

Vladimir Putin confirms an explosion at a supermarket in the Russian city of St. Petersburg was a terrorist attack. The identity of the attacker is still unknown. We speak with former Islamic State slaves from a Kurdish minority in Iraq, who escaped terrorist captivity, but half of those abducted remain missing. And Facebook reveals it has a unit to assist politicians in their campaigns, boasting that it helped the Scottish National Party in its landslide victory in 2015.