REUTERS
Ukrainian President Petro Poroshenko has expressed his condolences to the citizens of Britain in connection with human casualties as a result of the terrorist attack.
"Horrific act of terror in London. Our thoughts are with people of Great Britain today," he wrote on Twitter.
Ukrainian Prime Minister Volodymyr Groysman has also expressed support for families who lost their relatives.
"Horrendous act of terror in London took lives of innocent people. Our prayers for the victims. Our thoughts with those who lost their loved ones," he wrote on Facebook.