Israeli soldiers fired live bullets into the air and lobbed teargas and stun grenades to break up peaceful protests against Israeli blockades of Palestinian towns and villages.
The protests in the West Bank and Gaza Strip were the latest in nearly six months of conflict in the Palestinian uprising against Israeli occupation.
At the Al-Ram army checkpoint near Ramallah, soldiers fired tear gas and stun grenades to disperse a few hundred people marching and staging a sit-down protest. Several people were injured, witnesses said.
In the Gaza Strip, scores of Palestinian intellectuals, many dressed in suits and ties, carried Palestinian flags and chanted slogans in a peaceful march from Gaza City south to Netzarim junction, a crossroads which leads to a Jewish settlement.
The army, which has a post on the side of the road at the junction, said it had fired live ammunition into the air and hurled teargas at the demonstrators because they had come within a dangerous distance to the post.
The Israeli army takes control of the junction to guard convoys of Jewish settlers passing through, after bomb and machinegun attacks on settlers by Palestinians.
But it also takes over the road at other times, in what Palestinians describe as harassment of the Palestinian population. There were no settler convoys passing at the time of today'sprotest.
Roads to scores of Palestinian villages have been cut by ditches and rubble barriers in what the army says is a security measure but which Palestinians call collective punishment.
At least 348 Palestinians, 66 Israelis and 13 Israeli Arabs have been killed in the six-month-old uprising against Israeli occupation of the West Bank and Gaza.