A Palestinian was killed by the Israeli army in a clash near the southern West Bank city of Hebron early on Monday, his family said.
Relatives identified him as Munir Ahmed Badarin, in his early twenties.
They said he was shot near Al-Samua in the southernmost part of the West Bank, and died later in hospital.
Israeli military sources said soldiers shot Badarin after he and others threw stones and firebombs at Israeli vehicles passing nearby.
An army spokeswoman said earlier that troops in the West Bank had arrested 23 Palestinians overnight as part of their ongoing campaign to hunt down those who kidnapped and killed three Israeli teenagers last month.
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Palestinian security sources said the soldiers had arrested 13 people from the Hebron area overnight, three of them Hamas parliamentarians: Nayef Rajub from Dura, Mohammed Jheisha from Idhna and Mohammed Akel from Dhahiriya.
The Palestinian Prisoners Club said in a statement Israel had detained 11 Hamas parliamentarians overnight, raising the number of Palestinian lawmakers being held by Israel to 34, 23 of whom had been arrested since mid-June.
The kidnapping and murder of the Israeli teenagers triggered a chain of events which has led to the latest confrontation between Israel and Hamas militants in the Gaza Strip, which has claimed more than 170 Palestinian lives in just six days.
After the teens were snatched on June 12, Israel blamed Hamas militants and began a widespread crackdown on the movement in the West Bank, sparking a surge in rocket fire from Gaza.
After a Palestinian teenager was killed by Jewish extremists on July 2 in an apparent revenge killing, the fire from Gaza worsened, and Israel launched a major air campaign on July 8.
Since then, militants have fired more than 750 rockets at southern and central Israel, without so far killing anyone.