Palestinian Authority senior Abu Mazen said today that he does not believe the Israeli denials of plans to kill leading terrorists and reconquer Area A. At the same time, a United Arab Emirates newspaper, Ahbar el-Arab, writes today that Egypt has prepared a temporary headquarters for Arafat, in case Israel attempts to expel him. The Palestinians deny this report. In any event, Foreign Minister Shimon Peres said again today that Israel has no intention of striking at Arafat or the Palestinian Authority.