The Hague, Netherlands ? Slobodan Milosevic had regular access to drugs and alcohol smuggled into his prison cell, yet the U.N. war crimes tribunal failed to take action despite warnings, tribunal officials said Tuesday.

Two officials told The Associated Press the unit’s prison warden had cautioned the tribunal president and registrar that as a result, Milosevic’s health could not be guaranteed.

Nevertheless, they said, no action was taken to tighten supervision. The officials spoke on condition of anonymity because of the tribunal’s strict confidentiality rules.

The officials, who had access to confidential reports on Milosevic’s incarceration, were countering allegations by Milosevic’s loyalists that the former Serb president was poisoned or unwittingly given harmful drugs. They said two doctors had concluded that Milosevic intentionally took drugs that undermined the medicine prescribed for his heart ailments, in order to slow the pace of his war crimes trial.

Hours earlier, Milosevic’s son alleged his father was murdered in custody. “He got killed. There’s a murder,” Marko Milosevic told AP Television News.

The Milosevic family and Serb authorities agreed the former president would be buried in Belgrade, according to announcements in The Hague and in the Serb capital. Debate had centered over whether he should instead be buried in Moscow, where his son and widow, Mirjana Markovic, live.

It was not clear how the services would affect the arrest warrant for Markovic. Considered the power behind the scenes during Milosevic’s autocratic rule in the 1990s, she faces charges of abuse of power.

A Belgrade court said the warrant for Markovic would be suspended, but that she would be required to surrender her passport when she came to Serbia for the funeral.

Milorad Vucelic, vice president of the Socialist Party of Serbia, said “the decision has been reached to organize a dignified funeral for our late president” in the Serb capital. Vucelic, who was charged by the family with organizing the funeral, said it would be held Thursday or Friday.