Palestinian gunmen stormed a hospital in Jenin and seized the body of a young Israeli Druze civilian who had been in a car accident in the West Bank, authorities on both sides of the conflict said Wednesday.The Jenin Brigade, a Palestinian militant group based in the West Bank refugee camp, said in a statement obtained by CNN that it was holding the body of Ferro and demanded Israel hand over all the bodies of Palestinians killed by the IDF in Israel’s possession.Israeli Prime Minister Yair Lapid vowed Wednesday that “the kidnappers would pay a heavy price” if Tiran’s body was not returned: “Israel has proven in recent months that there is no place and no terrorist that it does not know how to reach.”Lapid said Ferro was going to celebrate his 18th birthday on Thursday.Tor Wennesland, UN Special Coordinator for the Middle East Peace Process, is involved in the negotiations with the Palestinian group for the release of Ferro’s body back to Israel, a spokesperson told CNN.The IDF said the body of the deceased was taken from the hospital and is expected to be returned to Israel shortly, “as a required humanitarian act.”Following the two blasts Wednesday in Jerusalem, Israel’s Ministry of Defense decided to close the Gilboa-Jalame and Salem crossings after a security evaluation, a spokesperson for the Coordinator of Government Activities in the Territories (COGAT) said."