May 21 (UPI) -- An ex-Ukrainian politician and top aide to former pro-Russian President Viktor Yanukovych was shot dead Wednesday in Spain outside an elite international school.

Andriy Portnov, a former adviser to Ukraine's former pro-Kremlin leader, was shot and killed at the American School of Madrid -- a private institution -- in a wealthy suburb of Spain's capital city.

Authorities received a call around 9:15 a.m. local time and sped to the scene in the Pozuelo de Alarcon neighborhood, according to Spain's interior ministry.

Portnov, 52, was reportedly dropping off his kids at school and walking to his black Mercedes when he was shot "several times" with about four or five bullets to the head and body, witnesses said.

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