Demonstrators frequently clash with troops in the Nilin pocket
Israeli troops have shot dead a 12-year-old Palestinian boy during a protest against Israel's barrier in the occupied West Bank, medics say.
The Israeli military said it was investigating what had happened.
It happened at Nilin village, west of Ramallah, where peace activists say Israel is taking 25 hectares of land from villagers to build the barrier.
The Israeli army is replacing the main access road to the village with a tunnel under military control.
Activists say the plan will have the effect of turning Nilin into a prison. Israel says the barrier and other construction work is necessary for security reasons.
The boy was identified by local organisers of the anti-barrier protest as Hamad Musa, AFP reported.
He was hit in the head by a live bullet fired by Israeli soldiers and died of his wounds while being transported to hospital, Palestinian medical sources said.
One activist told AFP the army dispersed protesters near the barrier using rubber-coated bullets and tear gas, and then fired live rounds at people gathering in the village.
An Israeli military spokeswoman said the army was carrying out a "serious" joint inquiry with Palestinian officials, in quotes carried by the AFP news agency.
Fifteen people were also reported injured by rubber-coated bullets during the demonstration.