Former Ukrainian politician Andriy Portnov, who worked as a senior aide to pro-Russian former President Viktor Yanukovych, has been shot dead just outside the Spanish capital Madrid, a Spanish national police source told CNN.

Andriy Portnov, an ex-Ukrainian politician and formerly top aide to former President Viktor Yanukovych, was shot dead Wednesday in Spain outside an elite international school.

Spanish authorities say that an adviser to former Ukrainian President Viktor Yanukovych has been shot dead outside a school in Madrid.