Attorney General Menachem Mazuz informed Interim Prime Minister Ehud Olmert on Sunday that the head of the right-wing Yisrael Beiteinu party, Avigdor Lieberman, will not be able to serve as public security minister as he is the subject of an ongoing police investigation.
Lieberman is being investigated for allegedly carrying out illegal business activity in Russia and breaching party funding laws.
The attorney general and State Prosecutor Eran Shendar made their decision after receiving an update from the police on the progress of the investigation into Lieberman's alleged activities.
A spokesman for the Yisrael Beiteinu leader said in response that the decision by Mazuz was a "political" one, and called on the prime minister to appoint Lieberman to the post.
"Olmert has to prove his leadership and do the right thing in making Lieberman the public security minister," the spokesman said.