Mohammed Abu Khudair, Palestinian teen, found dead in Jerusalem

The Palestinians accused Israeli extremists of abducting and killing an Arab teenager and burning his body Wednesday, sparking hours of clashes in east Jerusalem and drawing charges that the youth was murdered to avenge the killings of three kidnapped Israeli teens.

Seeking to calm the explosive situation, Israeli Prime Minister Benjamin Netanyahu urged a swift inquiry into the "reprehensible murder" and called on people to respect the rule of law. Palestinian President Mahmoud Abbas said it was clear extremist Jewish settlers were responsible and called on Israel to bring the killers to justice.

• Israel buries 3 slain teens, thousands converge for funeral
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• Kidnapping and murder of 3 teens raises tensions with Hamas

"The settlers have killed and burned a little boy. They are well known," Abbas said, accusing Israel of tolerating settler violence toward Palestinians. "I demand that the Israeli government hold the killers accountable."

The death added to the already heightened tensions caused by the killings of the three Israeli teenagers, whose bodies were discovered Monday just over two weeks after they disappeared in the West Bank. Israel accused Hamas, the Islamic militant group that controls Gaza, of being behind the abductions, which led to the largest ground operation in the West Bank in nearly a decade, with Israel arresting hundreds of Hamas operatives as part of a broad manhunt.

The discovery of the bodies led to a national outpouring of grief, with tens of thousands of people attending a funeral Tuesday in which the teens were laid to rest side-by-side. As the burial took place, hundreds of young, right-wing Israelis marched through downtown Jerusalem screaming for revenge.

Extremist Israelis blamed

Hours later, relatives of Mohammed Abu Khdeir said the 17-year-old was forced into a car in a neighbourhood of east Jerusalem that quickly sped off. A burned body believed to be his was found shortly afterward in a Jerusalem forest, though police said late Wednesday they were still awaiting forensics tests to make a positive identification.

Police spokesman Micky Rosenfeld said authorities were looking at "a number of different directions" in the killing, including nationalistic or criminal motives. "We are waiting for the final results of the autopsy," he said.

But Abu Khdeir's family said they had no doubt about the killers, accusing extremist Israelis of killing him to avenge the deaths of the Israeli teenagers.

"Who else could do this? There's no one else," said the teen's father, Saed Abu Khdeir. He said he spent the day with police and gave DNA samples to help identify the body.

As of Wednesday evening, police said the testing was still ongoing. Police were also reviewing security camera footage taken from the scene. Relatives said the video showed a car nearing the youth, people stepping out and forcing him into the vehicle and speeding away.

'Murder is murder'

The family of one of the Israeli teens condemned the death of the Palestinian youth. "There is no difference between [Arab] blood and [Jewish] blood. Murder is murder," said Yishai Fraenkel, an uncle of one of the teens.

As news of the youth's disappearance spread, hundreds of Palestinians in east Jerusalem took to the streets, torching light-rail train stations and hurling stones at Israeli police, who responded with stun grenades and rubber-coated bullets. Israel captured east Jerusalem, home to virtually all of the city's Palestinian population, in the 1967 Mideast war and annexed the area. The Palestinians seek the area as the capital of a future state, and tensions in the volatile eastern sector often boil over into violence.

The clashes continued throughout the day, emptying streets in east Jerusalem's normally bustling Beit Hanina neighbourhood.

Netanyahu called on authorities to swiftly investigate the "reprehensible murder" and urged all sides "not to take the law into their own hands."

But international condemnations came quickly.

In Washington, the Obama administration denounced the killing as a "heinous murder" and called for the perpetrators to be brought to justice.

"There are no words to convey adequately our condolences to the Palestinian people," said Secretary of State John Kerry, calling the killing "sickening."

UN Secretary-General Ban Ki-moon also called for the perpetrators of the "despicable act" to be promptly brought to justice.