A federal judge in Washington has given former Trump campaign chairman Paul Manafort until Friday to respond to allegations that he made several attempts to tamper with witnesses in his ongoing prosecution.

U.S. District Judge Amy Berman Jackson also set a hearing for June 15 where she will consider whether to revoke Manafort's house arrest and jail him while awaiting trial.

Prosecutors working for special counsel Robert Mueller say Manafort and an associate "repeatedly" contacted two witnesses in an attempt to get them to lie about the nature of lobbying and public relations work he directed on behalf of Ukrainian interests.

Manafort is currently facing charges in two criminal cases that accuse him of bank fraud, tax evasion and acting as an unregistered foreign agent.

A spokesman for Manafort denied the charges..

Jason Maloni said in a statement that Manafort is innocent and "nothing about this latest allegation changes our defense." Maloni said Manafort will do his talking about the allegations in court.

The statement comes a day after prosecutors working for special counsel Robert Mueller accused Manafort and one of his associates of repeatedly contacting two witnesses in an attempt to get them to lie about the nature of work he directed on behalf of Ukrainian interests.

A judge has set a hearing on the matter for next week. Manafort is facing charges of bank fraud, tax evasion and acting as an unregistered foreign agent.