President of Ukraine Volodymyr Zelensky says that law enforcement agencies must respond to information about the alleged influence of former U.S. Vice President Joseph Biden on the fifth president of Ukraine Petro Poroshenko, which has already been done by the Prosecutor General's Office (PGO).

"As for Poroshenko and Biden, yes, I heard, I will comment on it. I think this is not the last call (sign) that Ukrainians will see. The prosecutor's office, law enforcement agencies should respond. The Prosecutor General of Ukraine registered a criminal proceeding at the request of [Member of Parliament Andriy] Derkach yesterday. They will investigate," the president said during a press conference on Wednesday.

He added: "I know that this can be perceived, qualified as high treason. This is the matter of law enforcement agencies.