The Ukrainian government said it was in no position to begin repaying loans.
In his post, Mr Nayyem lamented the underfunding of his agency and excessive bureaucracy, which delayed reconstruction measures.
The visit is Mr Blinken’s fourth visit to Kiev since the Russian invasion of Ukraine in February 2022.
Mr Tusk arrived in the Ukrainian capital by train on Monday morning without prior public announcement for security reasons.
Ukraine has raised its outlook for this year’s harvest, forecasting it will bring in 10 per cent more crops despite Russia’s continuing invasion.
