صائب عريقات
Most of the documents are from the Palestinian negotiation support unit (NSU). The NSU was the PLO's main technical and legal advice organ in the peace negotiations, set up in 1999 and headed by Saeb Erekat. Gershon Baskin, codirector of Israel/Palestinian Center for Research, said, "I'm 100 percent sure that it's a former disgruntled employed" member of the Negotiations Support Unit headed by Palestinian chief negotiator Saeb Erekat. Israel's Channel 10 news show also named the source of the leak as a former member of the NSU.