Ratko Mladic, the Bosnian Serb general who oversaw atrocities in Bosnia in the 1990s, has died in prison at age 84, the Serbian state RTS television and the official Bosnian Serb television reported.

The reports said that Mladic died in a UN prison hospital in The Hague, Netherlands. A family member of Mladic, who spoke on condition of anonymity because of the sensitivity of the situation, confirmed the reports for the AP and said Mladic’s son, Darko Mladic, was on the way to the Hague.

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UN court officials told the AP in a statement that they could not immediately confirm Mladic’s death.

The UN tribunal for war crimes committed during the wars in Yugoslavia in the 1990s sentenced Mladic to life in prison in 2017 in what was considered a key step toward bringing justice to the victims. He had been in custody since 2011 after many years on the run.