Ukraine imposed sanctions on former president and opposition politician Petro Poroshenko, including an asset freeze and a ban on withdrawing capital from the country, for what the domestic spy agency said on Thursday were "national security" reasons.

Ukraine has imposed sanctions on former president Petro Poroshenko, citing national security concerns. The move has sparked political debate, with accusations against President Zelenskiy of political motivations.

President Volodymyr Zelensky on Thursday signed off on sanctions against former Ukrainian President Petro Poroshenko and other prominent Russia-leaning officials.