“Altogether four people have been arrested,’ police spokesman Micky Rosenfeld told AFP.
“The latest three people to be arrested are youths between the ages of 13 and 17. They are being questioned and the investigation is continuing.”
He said that the 19-year-old arrested on Saturday appeared in court on Sunday and his remand was extended.
Local media said he denied taking part in the assault in the early hours of Friday on four cousins from Israeli-annexed east Jerusalem, in which 17-year-old Jamal Julani was seriously hurt.