A Palestinian engineer employed by the United Nations Development Program (UNDP) has been charged with using his position to help the terrorist group Hamas, Israeli officials announced Tuesday. Waheed Borsh, a resident of Jabaliya in the Gaza Strip, was arrested on July 16 by the Shin Bet, Israel’s internal security service, and indicted Tuesday in an Israeli civilian court on charges of aiding Hamas. He had been employed as an engineer by the UNDP since 2003. Among his responsibilities for the UNDP, one of the world’s largest development agencies, were knocking down buildings damaged in war and clearing debris from the area after the demolitions.

The Shin Bet alleged that a senior Hamas official had ordered Borsh to use his position in UNDP to assist the terror organization. Borsh confessed that he had helped Hamas build a military jetty in the northern Gaza Strip to support Hamas’ naval forces and prioritizing the rebuilding of homes where Hamas members resided. He also admitted to notifying Hamas when UNDP would discover hidden weapons caches or terror tunnel openings in buildings they were rehabilitating, in violation of UNDP procedures. Hamas would then take over the site and recover the weapons.

Borsh also reportedly told authorities that other employees of NGOs are also working for Hamas. He is the third Palestinian aid worker in the past week to have been accused of aiding Hamas. Mohammad el-Halabi, the top Gaza official of the Christian charity World Vision, was charged on Thursday with funneling millions of dollars from the charity’s coffers and giving them to the terrorist organization. And on Monday, the NGO Save the Children announced that it would be investigating charges that one of its employees had been recruited by Hamas.

The recent arrests show “how Hamas exploits the resources of international aid organizations at the expense of the civilian population of the Gaza Strip,” the Shin Bet said in a statement.