Goran Hadžić, the former Croatian-Serb rebel leader, has died at the age of 57.

Hadžić was on trial for war crimes and crimes against humanity before the International Criminal Tribunal for the former Yugoslavia (ICTY) over his role in the 1991-1995 Yugoslavia war.

Last April, the Trial Chamber ordered an indefinite halt to his trial, as he battled the advanced stages of terminal brain cancer.

His health significantly deteriorated in the last two months and he spent most of that time in the hospital where he died.

Hadžić was the last fugitive arrested by the ICTY.

He was accused of having participated in a Joint Criminal Enterprise (JCE). It is alleged that the purpose of the JCE was the permanent forcible removal of a majority of the Croat and other non-Serb population from a large part of the Republic of Croatia in order to make it part of a new Serb-dominated state.

The accusations included the murder of civilians taken from Vukovar hospital in 1991 in one of the conflict’s darkest episodes.

He was also charged with responsibility for the massacre of Croat civilians who were forced to walk into a minefield in the Croatian town of Lovas in October 1991.

His trial opened in October 2012 following his arrest in Serbia in 2011 after seven years on the run.

Investigators had tracked Hadžić down as he was trying to sell an early 20th-century painting by the Italian master Amedeo Modigliani valued at several million dollars.