They are the first Italian officials to be linked to the abduction of Hassan Mustafa Osama Nasr, also known as Abu Omar.
An Italian judge has issued arrest warrants for four U.S. citizens.
Abu Omar says he was kidnapped in Milan, flown to Egypt and tortured.
An Italian court has already issued arrest warrants for 22 suspected U.S. agents over the abduction.
(compiled from agency reports)