There is no case for extraditing Mohammed Zuheir al-Siddiq as he is not wanted by the court in Syria, the source said.

Siddiq was initially seen as a leading witness in the U.N. probe but was discredited later for giving false testimony.

In October, a state security court in Abu Dhabi sentenced him to six months in jail and deportation for entering the United Arab Emirates on a forged Czech passport.

A defense lawyer said the sentence would end in mid-October because of time Siddiq had already spent in custody but it was uncertain whether he would be deported.

However, the official source said Siddiq remains in prison pending the decision on his possible deportation.

In initial reports of the U.N. inquiry commission into Hariri's February 2005 assassination in a huge bomb blast in Beirut, Siddiq was described as a key witness.

He claimed that Lebanon's former pro-Syrian president Emile Lahoud and Syrian President Bashar al-Assad gave the order to kill the wealthy businessman, who opposed Damascus's grip over its tiny neighbor.

However, Siddiq, a one-time member of Syria's intelligence services, later recanted, and Lebanese and Syrian judicial authorities accused him of lying.

In May, the prosecutor at the tribunal charged with bringing Hariri's killers to justice said Siddiq was no longer a credible witness and was of no interest to the inquiry.(AFP)