He had been walking casually near his home on a sidewalk when he was executed in the street.

The country's Prosecutor General's Office described Parubiy was fatally shot multiple times by an unidentified gunman who quickly fled the scene. It appeared to be a professional hit or assassination, given authorities described a gunman dressed as a courier on an e-bike as the killer. The assassin never removes his helmet during the attack from behind.

The 54-year old Parubiy served as speaker of Ukraine's parliament from April 2016 to August 2019 and was a prominent figure and organizer of 2014 Euromaidan protests (or Maidan coup) and anti-Russian/pro-EU coup events which ousted President Viktor Yanukovych, and in many ways led to the current Russia-Ukraine war.

He had also held the position of secretary of the National Security and Defense Council in early 2014, during the events of the civil/proxy war in the Donbass, as well as when Russia declared full sovereignty over Crimea.

President Volodymyr Zelensky within hours after confirmed the assassination and condemned it as a "horrific murder" and said "all necessary forces and means" would be used to uncover the plot and assailant. 

"Minister of Internal Affairs Ihor Klymenko and Prosecutor General Ruslan Kravchenko have just reported on the first known circumstances of a horrific murder in Lviv. Andriy Parubiy has been killed," Zelensky solemnly announced on social media. The shooting happened at around noon local time.

Parubiy is already being hailed as a national hero and "patriot" - including by Foreign Minister Andrii Sybiha, who said he "belongs in the history books". According to more:

National police said the shooting in Lviv was reported at around noon. Lviv Mayor Andriy Sadovyi said finding the killer and establishing the circumstances of the attack was of outmost importance.

"This is a matter of security in a country at war, where, as we can see, there are no completely safe places," he wrote on Telegram.

Tributes poured in from colleagues in parliament and the government, praising Parubiy's contribution to Ukraine's fight for sovereignty and independence as one of the leaders of what became known as the Euromaidan protests in 2013-14.