An Interfax Ukraine report on Tuesday quoted Ukraine's Deputy Minister of Foreign Affairs Olena Zerkal in an interview as saying prosecutors would name the four "top" suspects. 196 of those killed were Dutch nationals.
The Netherlands and Australia, which lost 38 people, hold Russian Federation legally responsible. The investigation has already determined that the missile which brought down the Malaysia Airlines plane came from a launching system which originated at a Russian military base, but not about who launched the missile.
An global team of investigators building a criminal case against those responsible in the downing of Malaysia Airlines Flight 17 is set to announce progress in the probe, almost five years after the plane was blown out of the sky above conflict-torn eastern Ukraine.
The Dutch-led probe has said it will first inform families, and then hold a press conference to unveil "developments in the criminal investigation" into the downing of the Malaysia Airlines Boeing 777.
Worldwide investigators are poised to name four suspects they believe are responsible for shooting down MH17 and level charges for the first time. The 283 passengers (193 Dutch victims) and 15 crew members all died in the crash.
Investigative website Bellingcat said separately it will also name "individuals linked to the downing of MH17" on Wednesday.More news: Lyon give Tottenham their price for Ndombele
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In 2016, it was revealed by an investigation team that the plane was shot by a Russian made Cold War rocket launcher.
The Netherlands has said Russian Federation has not co-operated with the investigation, and Moscow is not expected to surrender suspects.
They said their next step would be to identify individual culprits so they could be put on trial.
The war in eastern Ukraine and the MH17 disaster continue to plague relations between Russian Federation and the West.
Russian Federation has denied any involvement, despite overwhelming witness testimony, photographic and other evidence to the contrary.