A prominent Ukrainian politician and former parliament speaker has been shot dead in western Ukraine, officials said, as a search was under way to find the attacker. Andriy Parubiy, who also previously served as secretary of Ukraine’s National Security and Defence Council, was killed in the city of Lviv on Saturday.The Prosecutor General’s office said a gunman had fired several shots at Parubiy, killing him “on the spot”. The attacker fled, and a manhunt was launched, it said.Ukrainian President Volodymyr Zelenskyy condemned the killing as a “horrendous murder” and offered his condolences to Parubiy’s family and loved ones.“All necessary forces...