KIEV, Nov. 16 - Ukrainian investigators fear corruption probes could get buried because the national anti-corruption bureau will soon be flooded by thousands of old cases and recently passed legislation could further hobble their work, Reuters reported.

They come after the NABU anti-corruption bureau launched an investigation this week into an allied crime-fighting agency over extortion allegations.

From Monday, 3,500 cases that were registered before December 2015 will be transferred from the prosecutor’s office to NABU, which include for example investigations that may pertain to former Donald Trump campaign chief Paul Manafort.