Attendants had found Ahmed Chalabi dead in his bed in his Baghdad home.
A top US intelligence official has said there is no direct evidence of terrorism in the crash of a Russian passenger jet in Egypt that killed all 224 people on board, after the airline said it came down due to "external" factors.
Iran's leaders blame Saudi's 'negative' role, lash out at Saudi foreign minister.
If Saudi Arabia's vision on the big regional questions confronts reality and it stops its intrusions, we can solve many problems, says Iran's president.
Abadi's reforms including dismissal of the vice-presidents and deputy prime ministers and cuts to salaries of government employees halted.
Experts say human or technical error more likely caused the crash - although they concede a surface-to-air missile could have struck the aircraft if it had been descending for some reason.
Staffan de Mistura met with Syrian Foreign Minister Walid Muallem and presented a detailed report of the talks.