A Ukrainian lawmaker on Tuesday released a document that he claimed may link Donald Trump's former campaign chairman Paul Manafort to attempts to hide a $750,000 (£600,000) payment from a pro-Russia political party - a claim strongly denied by Mr Manafort's spokesman.

Lawmaker Serhiy Leshchenko, an investigative journalist turned MP, published a 2009 invoice purportedly signed by Mr Manafort that shows a $750,000 payment for 501 computers to a company called Davis Manafort. The money came from a Belize-registered offshore company via a bank in the Central Asian state of Kyrgyzstan.

Mr Leshchenko said the contract could be a cover for payments made to Mr Manafort for work he did for the pro-Russian Party of the Regions in Ukraine, which backed former Russia-friendly Ukrainian president Viktor Yanukovych, who fled the country amid anti-government protests in 2014.