Israeli police have found the body of a Palestinian teenager who was kidnapped overnight in East Jerusalem.
Mohammed Abu Khdair, 17, was seen being forced into a car
early on Wednesday. Within hours, his partly-burned corpse was
discovered in a forest.Israeli police were unable to confirm the motive, but Palestinian sources said it appeared to be a revenge attack for the murder of three Israeli teens.
Later, Palestinians clashed with Israeli police near the boy's home.
The protesters threw stones at the officers, who reportedly responded by firing sound bombs, tear gas and rubber bullets.
The mayor of Jerusalem, Nir Barkat, called for restraint.
"This is a horrible and barbaric act which I strongly condemn," he said in a statement. "This is not our way and I am fully confident that our security forces will bring the perpetrators to justice."
'Despicable murder' Initial reports said the boy was abducted near his father's shop in the Arab district of Shufat in East Jerusalem. Witnesses said he was bundled into a white car.
A few hours later, his body, partly burned and bearing marks of violence, was found abandoned in a forest near Givat Shaul, in the western outskirts of the city.
Israeli police spokesman Micky Rosenfeld said officers were looking into possible criminal or nationalistic motives for the killing.
At the scene: Yolande Knell, BBC News, Jerusalem Roads are closed off all around the Shufat neighbourhood of East Jerusalem as crowds of young Palestinians vent their anger. Some have begun destroying the shelters for the Israeli tram system.
Small groups are using catapults to launch stones at heavily armed Israeli police officers. They are responding with rounds of rubber bullets. An ambulance has whizzed past with sirens blaring suggesting there have been injuries.
Locals say the dead Palestinian boy was Mohammed Abu Khdair, although Israeli police have not confirmed that. His funeral is expected to take place later on Wednesday; that will be another cause for tension.
While there has been no confirmation that this was a revenge attack for the three murdered Israelis whose bodies were found in the West Bank earlier this week, there is no doubt among Palestinians here about what has happened.
Palestinian Authority President Mahmoud Abbas said he had demanded that Israeli Prime Minister Benjamin Netanyahu "condemn the kidnapping and murder" of Mohammed Abu Khudair "as we condemned the kidnapping of the three Israelis".
Shortly afterwards, Mr Netanyahu denounced what he called as a "despicable murder".
"Prime Minister Netanyahu calls all sides not to take the law into their own hands - Israel is a law-abiding state and everyone is obliged to act according to it," his office said in a statement.
The BBC's Kevin Connolly says it is too early to say for sure, but there is a real possibility that the killing is a tit-for-tat reprisal, with all the dangers that would pose for the broader relationship between Israel and the Palestinians.
The killing comes a day after funerals were held in the West Bank for the three Jewish seminary students whose bodies were found near the city of Hebron on Monday, two-and-a-half weeks after they were abducted.
Media reaction to killing of Israeli teenagers ISRAELI PRESS
"How does one prevent the next event?... The answer is hard and painful. Without hot-headedness, without promises and hollow threats, what is left for us is to liquidate Hamas in the Gaza Strip, from the head of its leaders to the last terrorist." Brig-Gen Tzvika Fogel in Yisrael Hayom
"In a few days, when the dust settles and everyone finishes arguing, we will return to square one, to the core issue: For how many tens of years will it be possible to control another people?" Amnon Abramovitch in Yedioth Aharonot
PALESTINIAN PRESS
"The world must know that the Israeli military operation launched in the wake of the three settlers' kidnapping caused great suffering for large sectors of the Palestinian people in the West Bank and Gaza Strip. These people mostly have no political affiliations but are, nevertheless, paying the price of this collective punishment." Editorial in al-Quds
"The killing of the three settlers was met with the martyrdom of seven Palestinians, some of them as young as the settlers or even younger. So, why does the world denounce the killing of the settlers while no one denounces what the Israeli army has done against Palestinian citizens?" Ashraf al-Ajrami in al-Ayyam
Mr Netanyahu vowed to strike at Hamas, the Palestinian Islamist group he holds responsible for their deaths. It has denied any involvement.
On Tuesday night, dozens of Israelis took to the streets of Jerusalem to protest against the murder of the three teenagers. There were reports that at one demonstration some people shouted "death to the Arabs".
About 40 Palestinians were arrested throughout the West Bank as the Israeli authorities continued to crack down on Hamas. Four were injured early on Wednesday after being shot during a raid in the city of Jenin.