Police have arrested four Jewish teenagers for allegedly attacking a 15-year-old Arab youth last week in the Jewish Quarter of Jerusalem’s Old City.

The suspects, all aged 14-15, were taken in and questioned Monday. Two were released after questioning, while the other two were sent to house arrest for five days after a Jerusalem magistrate denied a request to remand them in custody while police attempted to determine if they were involved in two previous attacks on Arab youths.

Of the two who were sent to house arrest, one implicated himself in the attack, while the other denied involvement.

Also on Monday, 15 cars were torched in two separate incidents in Arab villages in Israel and the West Bank.

In Akbara, about 2.5 kilometers (1.5 miles) south of Safed in the north, four cars were burned and a nearby wall was spray-painted with the message “Don’t touch our girls.”

Justice Minister Tzipi Livni condemned the apparent “price tag” attack in Akbara, calling it an example of “violent and ugly racism.”

She vowed to fight all incidences of people “taking the law into their own hands.”

Outside of Ramallah, in Deir Jarir, about 32 kilometers (20 miles) north of Jerusalem, 11 cars set on fire. Four of them were completely destroyed. There was no graffiti at the scene, but Palestinians from the village accused Jewish settlers of the attack.

Police were investigating into both incidents.