Spanish authorities say an adviser to former Ukrainian President Viktor Yanukovych was killed outside the American School of Madrid.

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.

According to reports from Spanish radio station Cadena SER, the victim was a former advisor to ousted Ukrainian president Viktor Yanukovych.