Andriy Portnov, a former high-ranking Ukrainian politician linked to ousted pro-Russian president Viktor Yanukovych, was shot dead outside the American School of Madrid on Wednesday. Portnov, previously wanted for treason in Ukraine and under U.S. sanctions for corruption, was attacked by multiple assailants as he entered a vehicle. His death, viewed by many Ukrainians as the act of a traitor, is under investigation by Spanish authorities amidst rising tensions involving Ukrainian and Russian expatriates in Spain.