Summary Zurab Zhvania died in 2005 in a friend's apartment.
Prosecutors in Georgia say they have launched a new probe into the 2005 death of an influential prime minister.
Zurab Zhvania, who helped lead Georgia's 2003 revolution that toppled the post-Soviet regime of Eduard Shevardnadze, died in 2005 in a friend's apartment from what officials said was an accidental gas leak from a heater. Officials then ruled out foul play although not all circumstances of the case were clear.
The deceased prime minister's brother, Giorgi Zhvania, insisted that President Mikhail Saakashvili is hiding the truth about his brother's death.
Billionaire Bidzina Ivanishvili, a Saakashvili rival whose party won the parliamentary election this year, called for a new probe into Zhvania's death.
