Bedouin Arabs living in Israel protested in the Negev Desert and towns and cities on Saturday over government plans to resettle them.
A "day of rage" was held in the Negev, Haifa, Jerusalem, the West Bank and Gaza.
The BBC reports the Bedouin say the plan will force them out of their ancestral land.
Israeli officials say it aims to provide better services and infrastructure - and settle long-standing land disputes.
Police in the Negev used tear gas and water cannon against demonstrators, some of whom were throwing stones, reportedly injuring 15 officers.
The Haaretz newspaper reported that 28 people were arrested in Haifa and the Negev village of Hura.
Before the creation of the state of Israel in 1948, groups of Bedouin Arabs lived a semi-nomadic life in the Negev but many are now settled in what are known as "unrecognised villages".
Because they have no formal planning status, the BBC reports they have no access to government services including electricity and running water.
Officials say the plan calls for the majority of Bedouin to live where they are, while allowing them to preserve their traditions in a modern state.
