Shops, schools and businesses were shuttered in Arab towns and villages where a general strike was observed over Saturday's killing of a 22-year-old in Kfar Kana near the northern city of Nazareth.
In the town today mounted police dispersed masked protesters who hurled stones and fireworks, blocked streets with burning tyres and waved Palestinian flags.
Police spokeswoman Luba Samri said that 22 people were arrested, among them minors.
Kheir Hamdan was shot after he attacked a police vehicle with a knife as officers tried to arrest a relative.
Relatives say Hamdan was killed "in cold blood", with CCTV images apparently contradicting the official version.
In the video he is seen banging on a police van window with a knife before starting to run off.
Then a uniformed officer gets out of the vehicle's back door and fires his handgun at Hamdan, who falls to the ground.
Officers then drag his body into the vehicle by one arm.
Israel's attorney general on Sunday convened an emergency meeting on the incident, hearing initial reports from the police internal affairs division, a justice ministry statement said, adding that the inquiry would continue.
Arab students protested the Kafr Kana killing Sunday in Jerusalem, the northern port city of Haifa and in Beersheva in southern Israel's Negev desert.
In the northern Arab town of Umm al-Fahm, about 250 people rallied, among them firebrand Islamic cleric Raed Salah, an AFP photographer said.
Stones were hurled at a bus on the main Jerusalem-Tel Aviv highway alongside the Arab village of Abu Ghosh, police said.
Elsewhere in east Jerusalem, masked Palestinians hurled petrol bombs at police in A-Tur and threw stones in Issawiya, with police responding with "riot dispersal means" in both cases, police statements said.
No injuries were reported.
