Palestinian police say a 15-year-old boy has been found hanged near the town of Qalqilya in the West Bank.
They said several family members had confessed to involvement in the killing, accusing the boy of collaborating with the Israeli army.
Collaboration is viewed as a serious offence in Palestinian society. Suspects are often summarily killed.
However, police said it was unlikely that such a young boy would have been recruited as an informer.
He has been named in the Palestinian press as Raed Sawalha.
Palestinian police spokesman Adnan Damiri said those responsible for the boy's death would be brought to justice.
He said the boy's father, uncle and cousin confessed to the killing, but that police were also investigating other motives for the killing, the Associated Press reported.
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