An Israeli soldier was shot and killed in an overnight attack at a checkpoint in east Jerusalem, the Israeli army said Sunday.

A police spokesperson had announced earlier that a manhunt was underway for an assailant who had "shot and severely injured two Israelis" at a checkpoint near Shuafat Palestinian refugee camp.

A third person, whose nationality was not specified, was hit by "shrapnel", according to Magen David Adom (MADA) -- the emergency medical services that are Israel's equivalent of the Red Cross.

Israeli forces on Sunday hunted a Palestinian suspected of killing an 18-year-old military policewoman in east Jerusalem, an attack that left another Israeli in critical condition from a gunshot wound to the head.

The Saturday shooting at a checkpoint by the Palestinian refugee camp of Shuafat in Israeli-annexed east Jerusalem came amid spiralling violence in the Israeli-Palestinian conflict.

Hours earlier, two Palestinian teenagers were shot dead in an Israeli raid in the West Bank, as the United Nations warned of "mounting violence" in the occupied Palestinian territory.

Iranian President Ebrahim Raisi said Saturday that the country's students won't "allow the enemy's false dreams to come true", as protests sparked by the death of Mahsa Amini entered their fourth week.

A wave of unrest has rocked Iran since the 22-year-old Kurdish woman died on September 16 after her arrest by the morality police in Tehran for allegedly failing to observe the Islamic republic's strict dress code for women.

Schoolgirls chanted slogans, workers went on strike and protesters clashed violently with security forces across Iran on Saturday, as demonstrations over the death of Mahsa Amini entered a fourth week.

Anger flared after the 22-year-old Iranian Kurd's death on September 16, three days after her arrest in Tehran by the notorious morality police for an alleged breach of the Islamic republic's strict dress code for women.

Two Palestinians were shot dead in the occupied West Bank city of Jenin on Saturday, the Palestinian health ministry said, as Israeli troops carried out an arrest operation.

In a statement, the ministry announced the killing of "two citizens by occupation (Israeli) bullets in Jenin", a flashpoint in the northern West Bank.

Eleven others were wounded, three of them seriously, the ministry added.

Iran may use the Islamic veil as a tool of oppression, but the hijab is also the weakest pillar of an embattled regime trying to forestall its own "Berlin Wall" moment, an Iranian-American activist based in New York tells AFP.

Masih Alinejad, 45, who fled Iran in 2009, became known in 2014 after she launched a social media campaign called mystealthyfreedom.org that encourages Iranian women to protest against the obligation to wear the hijab in their country.

Canada announced Friday it will permanently deny entry to more than 10,000 members of Iran's "murderous" regime, including the Islamic Revolutionary Guard Corps that Ottawa blames for "heinous" acts against the Iranian people.

Prime Minister Justin Trudeau said he would list Iran under "the most powerful provision" of Canada's immigration and refugee act to make "over 10,000 (IRGC) officers and senior members most responsible for this heinous state behavior inadmissible to Canada."

Big-hitting American star Bryson DeChambeau insisted Friday that the failure to award world-ranking points to the Saudi-backed LIV Golf event in Thailand was just "delaying the inevitable" and blasted "lies" that have plagued the rebel tour.

The Official World Golf Ranking (OWGR) organisation said on Thursday that players will not receive ranking points at the ongoing Bangkok event or at the next LIV tournament in Jeddah next week.

Iran said Friday an investigation into the death in custody of Mahsa Amini found she lost her life to illness rather than reported beatings that sparked three weeks of bloody protests.

Amini, 22, died on September 16, three days after falling into a coma following her arrest in Tehran by the morality police for allegedly breaching the Islamic republic's strict dress code for women.

Anger over her death has triggered the biggest wave of protests to rock Iran in almost three years and a crackdown that has killed dozens of protesters and seen scores arrested.

Fountains in Tehran appeared to be pouring blood Friday after an artist turned their waters red to reflect a deadly crackdown amid weeks of protests sparked by the death in custody of Mahsa Amini.

A wave of unrest has rocked Iran since the 22-year-old Kurdish woman's death was announced on September 16 after her arrest in Tehran for allegedly failing to observe the Islamic republic's strict dress code for women.