Juadat Milhem, the brother of the alleged Tel Aviv gunman Nashat Milhem, was arrested on Friday, and is being held on suspicion of direct involvement in the murderous attack on Dizengoff Street.
Juadat Milhem, 25, was remanded into custody for five days by Haifa Magistrates Court on Saturday. The court accepted a request from the state that he be barred from seeing a lawyer for three days.
He is suspected of being an accomplice to murder, and of premeditated manslaughter.
His lawyer said Juadat had nothing to do with the attack.
A massive hunt continued throughout Saturday for the alleged killer, Nashat Milhem, a 29-year-old resident of Arara, a village in Wadi Ara in northern Israel.
A gag order barring publication of his name was lifted late Saturday.
The suspect’s father Muhammad, a police volunteer, recognized his son in video footage of the attack, and called the police. The weapon used in the attack was reportedly stolen from the father’s safe at home.