(CNN) Donald Trump's campaign chairman, Paul Manafort, has been named in an investigation by Ukrainian authorities looking at whether he and others received millions in illegal payments from Ukraine's former pro-Russian ruling party, according to the National Anti-Corruption Bureau. The probe is part of a wider investigation by the bureau into allegations of corruption and influence peddling against ex-president Viktor Yanukovich's administration, for whom Manafort worked as a political consultant, before the leader's violent ouster in 2014. The investigation is looking into "shadow accounting" and potentially illegal payments made by Yanukovich to Manafort and other Ukrainian election officials, according to Ukraine's National Anti-Corruption.Clinton campaign manager Robby Mook called on Trump to disclose campaign connections to RussiaDemand follows New York Times report on ties between campaign chairman and pro-Russian forces in Ukraine
"My work in _ ceased following the country's parliamentary elections in October 2014. In addition, as the article points out hesitantly, every government official interviewed states I have done nothing wrong, and there is no evidence of 'cash payments' made to me by any official in _.