Israeli troops have raided a hospital in the West Bank city of Nablus, and arrested an injured Palestinian militant said to be seriously ill.
Reports said the man had been shot in the stomach during clashes with Israeli forces in the area earlier this week.
The hospital director said the operation to seize the man had violated all principles of humanitarian ethics.
Israeli military officials said he was a member of the Popular Front for the Liberation of Palestine (PFLP).
They said the man, Jawad al-Kaabi, had been transferred to a hospital in Israel.
Mr Kaabi was said to have been in a serious condition when he was taken from the church-run Saint Luke Hospital.
The 20-year-old, who Israelis say was a senior figure locally in the PFLP, had been shot on Wednesday during an Israeli operation in the Balata refugee camp.
Israel routinely raids West Bank cities looking for suspected militants.
In March, the Israeli military snatched four members of the PFLP from a jail in the West Bank town of Jericho.
They are alleged to have shot Rehavam Zeevi, a hardliner who advocated deporting Palestinians from the occupied territories.
The PFLP said the assassination was revenge for the killing of its leader.