The case of ex 2016 presidential campaign manager Paul Manafort will not affect U.S.-Ukraine relations, Ukraine's Ambassador to the U.S. Valeriy Chaly has said.

"How can it impact our bilateral ties? Let me be honest with you. If we, our politicians don't try to use Washington for our political battles based on this case, then it will not have any negative effect," Chaly said at a press conference in Kyiv on Tuesday, when asked whether the Manafort case will affect Ukraine-U.S. relations.

Chaly said that if political experts want to play around with the subject, "I warn you, you may fall under a serious attack, at least an attack from mass media."

The ambassador emphasized that the Manafort case is an internal affair of the United States.

"As for processes taking place in the United States, various court proceedings, Russian interference in the elections, this is a U.S. domestic issue. I, as ambassador, do not meddle. We are monitoring the situation, tracking events," the diplomat said.

As earlier reported, a criminal case against Manafort for tax and bank fraud is currently in progress in Alexandria, Virginia. Another case against Manafort, involving money-laundering and obstruction of justice, is scheduled to be held in Washington in September.

Charges against Manafort were put forward in the framework of the investigation headed by U.S. Special Counsel Robert Mueller, who has been tasked with investigating Russia's possible meddling in the U.S. 2016 presidential election and other crimes.