PPS said at the Qalandiya military checkpoint, in the central West Bank district of Ramallah, two Palestinians were detained.
The body of Ori Ansbaher, 19, was found on Thursday evening in the south of Jerusalem, and she was buried on Friday in the Israeli settlement of Tekoa.
All other details of the woman's killing remain the subject of an Israeli gag order.
The Dutch government has announced it will start to recognise the Gaza Strip and the occupied West Bank, including East Jerusalem, as official birthplaces for Palestinians who were born in the country after the establishment of Israel.
Prime Minister Benjamin Netanyahu congratulated the security services for the speed with which they arrested "the abhorrent murderer". He expressed condolences to Ansbacher's family.
"He was everything lovely at home; his voice, his happiness fills the house".
The health ministry put Ishtiwi's age at 18, but Mezan said he was 17.
The military said it was aware of reports that a protester had been killed but could not confirm that the individual was a 14-year-old or what caused the death. Dozens of Palestinians have been killed and thousands have been wounded.
The Gaza-based al-Sha'b Radio station reported that several explosions were heard in the area after activists threw several sound and percussion bombs on the border, adding that Israeli soldiers fired tear gas and gunshots at them; no injuries were reported.
While Palestinians have claimed the protests are peaceful, Israel says that Hamas, the Islamist group ruling Gaza, has hijacked the months-long movement in an effort to attack Israeli forces and breach the border fence to commit terrorist acts in Israel.
The U.N. children's agency condemned the killing of the two Palestinians, warning of the "significant violence" Palestinian children endure.
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Soundarya has been a graphic designer for a while, having worked in films like Baba , Majaa , Sandakozhi and Sivaji . Soundarya Rajinikanth picked traditional Kanjeevaram silk saree for her wedding with Vishagan Vanangamudi.
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