The four Palestinians being tried for killing tourism minister Rehavam Ze'ev caused a commotion Monday as they left the Jerusalem Magistrate's Court.
The handcuffed suspects clashed with police who prevented them from meeting their families who had gathered at the courthouse.
During the hearing Hamdi Kura'an, who initially confessed to having pulled the trigger on the tourism minister, retracted his statement.
Basel al- Asmar admitted that he stood next to the killer and that he was under instruction to shoot anybody who approached the scene, including Ze'evi's wife.
Head of PFLP Majdi Rimawi said that although he was aware of the planned assassination, he himself was not directly involved.
The fourth suspect, Ihad Alma, also denied the charges.
The four face an additional charge of blowing up six explosive-filled cars six years ago.