Israeli-Arab protesters have clashed with police as Jewish-Israeli right-wingers held a march in the majority-Arab town of Umm al-Fahm in northern Israel.
Police declared an Israeli-Arab counter-demonstration illegal and ordered the protesters to disperse.
Police used stun grenades and tear gas to break up the crowds of hundreds of Israeli-Arab protesters.
Israeli-Arabs hit back by throwing stones at police, as the demonstration descended into violence.
The trouble began during the march of about 100 far-right Israeli-Jewish activists through Umm al-Fahm.
About 2,500 police were deployed to protect the Jewish marchers, whom after several postponements the High Court allowed to march on the outskirts of Umm al-Fahm, but not in the centre.
One of the leaders of the march was Baruch Marzel, who led the anti-Arab Kach party that was banned in Israel in 1994.
Israeli-Arabs make up about a fifth of Israel's population and hold full Israeli citizenship, but face widely-documented discrimination.