(CNN) New documents released Friday evening by House Democrats show communications between indicted Rudy Guiliani associate Lev Parnas and an aide to the top Republican on the House Intelligence Committee in which they arrange interviews with Ukrainian officials and apparent meetings at the Trump hotel in Washington, DC, including with Giuliani.

The materials draw California Rep. Devin Nunes even further into the efforts undertaken by Giuliani and his associates to dig up dirt on the President's political rivals.

The WhatsApp exchanges show that Nunes aide Derek Harvey raised questions about foreign assistance to Ukraine in late March 2019.

On March 29, 2019, Harvey asked Parnas, "Can we get materials?"

Parnas told Harvey in an April text message that he would be interviewing "the general prosecutor that got fired by Biden," who is Viktor Shokin. Parnas also referenced Ukraine's then-prosecutor, Yuriy Lutsenko. Both prosecutors also spoke to Giuliani in his effort to dig up dirt on the former Vice President Joe Biden and his son, Hunter.