Palestinian militants shot a teenaged girl in the head, killing her for "collaborating" with Israel, Palestinian sources said on Friday.
They said 18-year old Rajah Ibrahim was the second female in a week to be killed by members of the al-Aqsa Martyrs Brigades, who are affiliated with Yasser Arafat's Fatah movement.
Sources close to al-Aqsa said they killed her three days after abducting her in Tul Karm.
It was reported earlier that the militants had kidnapped a brother and sister from Tul Karm on suspicion of aiding Israel.
The kidnappers were threatening to execute the two, who are the niece and nephew of Ikhlas Khouli, the 35-year-old mother of seven who was seized from her Tul Karm home and shot dead Saturday after admitting to collaborating with Israel.
Khouli's sister, who is the mother of the two arrested Thursday, was also interrogated, but was released after admitting her collaboration with Israel. She said that the admitted to the charges after being tortured.