JERUSALEM (AP) — Israeli forces killed two Palestinians in clashes in the occupied West Bank on Thursday and a third in Jerusalem after he opened fire at a police officer, hours after a car-ramming attack elsewhere in the city wounded 12 Israeli soldiers.

Tensions have soared following last week’s release of President Donald Trump’s Mideast initiative, which greatly favors Israel and was rejected by the Palestinians. The violence put the plan on even shakier ground and raised fears of another extended round of fighting in the decades-old conflict.

The plan would allow Israel to annex all of its settlements and large parts of the occupied West Bank — sparking calls from Israeli nationalists to do so immediately. In return it would grant Palestinians limited autonomy in scattered enclaves surrounded by Israel, but only if they met nearly impossible conditions.

The Trump plan “created this environment of tension and escalation,” Nabil Abu Rdeneh, a spokesman for Palestinian President Mahmoud Abbas, told the official Palestinian news agency, WAFA.

The violence began early Wednesday, when a Palestinian motorist slammed his car into a group of Israeli soldiers, wounding 12 before fleeing the scene, the Israeli military said. In the West Bank, two Palestinians were killed in clashes with Israeli troops, Palestinian hospital officials said.

Later, Israeli police said they shot and killed an Arab citizen of Israel who opened fire at forces in Jerusalem’s Old City, lightly wounding an officer.

Israeli military spokesman Lt. Col. Jonathan Conricus said one of the 12 injured soldiers in Jerusalem was seriously hurt and the others were lightly injured. Israeli police spokesman Micky Rosenfeld said the incident was being treated as a “terror attack,” and said Israeli forces were searching for the assailant.

Palestinian hospital officials said a 19-year-old was killed in clashes in the West Bank city of Jenin. Six others were wounded in the confrontation. In a separate incident in Jenin, a member of the Palestinian security forces was shot and killed by Israeli troops.

On Wednesday, Israeli forces shot and killed a 17-year-old Palestinian during clashes with demonstrators elsewhere in the West Bank.

Conricus, the military spokesman, said Israeli forces are “not trying to escalate the situation while understanding the complexity and sensitivity of the situation.” He stopped short of linking the violence to Trump’s Mideast proposal.

In the first Jerusalem incident, the troops were out on a late-night “educational heritage tour,” walking near a popular entertainment district in Jerusalem when the motorist rammed his car into them and fled.

While it did not claim responsibility for the attack, the Islamic Jihad militant group praised the car ramming as “the beginning of a new confrontation over Trump’s plan.”

Israeli Prime Minister Benjamin Netanyahu vowed to have the assailant apprehended. “It’s just a matter of time — and not much time,” he said in a statement.

Such acts of violence were common in Jerusalem during a low-level wave of near-daily attacks a few years back, but they tapered off and car rammings have become infrequent.

Conricus said troops were carrying out the demolition of a home in the West Bank belonging to a militant allegedly involved in a deadly attack. He said there was a “sizable riot” at the scene by Palestinians who threw firebombs and that a sniper also fired at troops. Conricus said forces responded to the violence with their own sniper fire, killing a Palestinian shooter.

Jenin governor Akram Rajoub said the 19-year-old casualty was a student at an academy that trains budding police officers, and was throwing stones at the troops.

Meanwhile, there have been a steady stream of rockets and mortar rounds fired out of the Gaza Strip, which is ruled by the Islamic Hamas movement, since the plan was released. Israel has responded with waves of airstrikes. The near-daily exchanges of fire have not caused casualties.

On Thursday, Israel struck Hamas positions in Gaza after three mortar shells were fired at Israel. There was no immediate report of injuries on either side.

Unveiled last week at the White House with much fanfare, Trump’s plan sides with Israel on the most contentious issues that have bedeviled past peace efforts, including borders and the status of Jerusalem and Jewish West Bank settlements. It attaches nearly impossible conditions for granting the Palestinians their hoped-for state, including the full disarming of Hamas.

The plan was greeted ecstatically in Israel, with Netanyahu vowing to speed ahead with annexing parts of the West Bank. But under pressure from the U.S. administration, he appears to be scaling back on that promise, at least until after March elections.

The Palestinians dismissed the plan as “nonsense” and have promised to resist it.

The Palestinians, as well as much of the international community, view the settlements in the West Bank and annexed east Jerusalem — territories seized by Israel in the 1967 war — as illegal and a major obstacle to peace.

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Associated Press writer Mohammed Daraghmeh in Ramallah, West Bank, contributed to this report.