Unverified footage, purportedly of the shooting, appears to show a gunman dressed as a courier approaching Parubiy on the street and holding up a weapon as he walks behind him, before fleeing. A huge manhunt is now under way for the suspect. Ukrainian President Volodymyr Zelensky described Saturday's attack as a "terrible murder" and offered condolences to Parubiy's family. Parubiy, 54, rose to prominence during Ukraine's Euromaidan mass protests, which advocated closer ties with the EU and brought down pro-Russian former President Viktor Yanukovych in 2014.

A special operation, codenamed Siren, has now been launched by Ukrainian authorities aimed at tracking down and arresting the suspected shooter. "All necessary forces and means are being deployed," Zelensky said in a statement. Ukraine's prosecutors said "an unidentified gunman fired several shots at the politician" and that Parubiy "died on the spot". At a news briefing later on Saturday, Lviv police chief Oleksandr Shliakhovskyi said the gunman had "fired about eight shots from a firearm, which has not yet been identified".

He added that the attack appeared to have been "very carefully planned". Meanwhile, Lviv's chief prosecutor Mykola Meret said all possible motives for the shooting were being investigated, including potential Russian involvement. Sources in Ukraine's law enforcement agencies told BBC News earlier that seven shell casings were later found at the scene. The source also said the attacker was dressed to look like a courier for delivery company Glovo. In the video of the incident, the suspect can be seen carrying a yellow delivery bag. The assailant is also reported to have had an e-bike. A spokeswoman for Glovo said the firm was "deeply shocked by the brutal crime" and would co-operate fully with the investigation into the incident. (BBC)