Police in the North arrested suspected organized crime figure Amir Mulner and three others on Friday after stopping the vehicle in which they were traveling and finding parts of an explosive device.
The four were brought before Nazareth Magistrates Court where their remand was extended until Thursday. The other people in the vehicle were Mulner's two body guards and a member of the Karaja family, another suspected crime group, police said.
The vehicle was stopped near Baka al-Gharbiya after arousing the suspicion of Border Police volunteers. Although Mulner gave a false name, he was recognized by the central unit officers who came to take him in for questioning.
The commander of the Amakim region, Deputy Superintendent Ya'acov Zigdon, has appointed a special team led by police Superintendent Dudu Pill to investigate the matter.
Last month, Mulner was stabbed in the Daniel Hotel in Herzliya during an 'underworld summit' in which the participants had gathered to discuss future cooperation with each other.
The chief suspect in the case is Ya'acov Alperon, who gave himself up to police almost two weeks ago and who once again appeared in Tel Aviv Magistrates Court on Friday, when his remand was extended until Sunday.