Romania's top prosecutor on Monday charged former ex-President Ion Iliescu for his role in a bloody anti-communist revolution that left more than 800 people dead.

The charges are part of a three-year investigation into allegations of crimes against humanity during a five-day period following the ouster of late Communist leader Nicolae Ceausescu.

Read more: Opinion: The hideous face of communism is alive and well in Romania

Details of the case:

• Iliescu took power in the immediate wake of Ceausescu's ouster.
• He oversaw Ceausescu and his wife's trial and summary execution.
• Prosecutors accused him last year of forming a group in 1989 to usurp power.
• During his power grab, a general "terrorism psychosis" was fueled in Romania, according to prosecutors.

Read more: Romania's faded architectural gems want to be kissed awake

'Necessary act'

General Prosecutor Augustin Lazar said: "The completion of this case by our military prosecutors, is one of the most important goals in the management project I assumed publicly three years ago: to solve Romania's historical files."

Romanian President Klaus Iohannis praised the probe, saying: "Finalizing the judicial investigation in the Revolution events, 30 years since Communism collapsed, is a necessary act and honors our heroes. The crimes of the Revolution cannot go unpunished."

Former President Iliescu has rejected allegations of wrongdoing during the anti-Communist revolt, saying they amount to an "act of political revenge."

Read more:Dungeon of silence: Romania's struggle with the past 

What was the 1989 revolution?

The Romanian Revolution is often referred to a five-day period of anti-Communist fervor in December 1989 that led to the summary execution of the former dictator Ceausescu and his wife, along with hundreds of others.

Up to 1,290 people were killed and more than 3,000 others injured during the period of violent civil unrest. Prosecutors have accused Iliescu, who once served as a Communist official, of engaging in "broad and complex misleading activities of diversion and misinformation" that spurred the ensuing chaos.

Read more: Romanians reflect on life during communist era

Who is Ion Iliescu?

Iliescu is the former president of Romania. Before ascending to power during anti-Communist unrest in 1989, he held various positions in the Communist government, including ministerial posts.

During the unrest, he led the country and a year later was formally tapped to lead the country under a transition period. In the 1990 presidential election, he won with 85 percent of the vote. He later served two more terms as president.

What happens next? Iliescu, who is 89-years-old, is expected to stand trial along with former Vice Premier Gelu Voican-Voiculescu and ex-Air Force Chief Iosif Rus. However, prosecutors have yet to set a date for the trial.

Every evening, DW's editors send out a selection of the day's hard news and quality feature journalism. You can sign up to receive it directly here.

ls/aw (AP, Reuters)