The American-sponsored Rogers Plan for the Israeli–Palestinian conflict was publicized in July—based on Security Council Resolution 242. Nasser and Hussein accepted the plan, but Arafat rejected it on 26 July, claiming that it was a device to liquidate his movement. The PFLP and DFLP were more uncompromising, vehemently rejecting the plan and denouncing Nasser and Hussein. Meanwhile, a ceasefire was reached between Egypt and Israel on 7 August, formally ending the War of Attrition. On 15 August, Arafat was alleged to have said that "we have decided to convert Jordan into a cemetery for all conspirators—Amman shall be the Hanoi of the revolution." Paradoxically, Arafat had cautioned Habash and Hawatmeh, the respective leaders of the PFLP and the DFLP, from provoking the regime, as it enjoyed military superiority and could terminate their existence in Jordan at any time. But his calls went unheeded, and they started to call more openly for the overthrow of the Hashemites as a "prelude to the launching of a popular war for the liberation of Palestine". Another engagement between the army and the fedayeen occurred at the end of August, after the fedayeen ambushed army vehicles and staged an armed attack on the capital's post office. Black September Aircraft hijackings Hussein's motorcade came under fire on 1 September for the second time in three months, triggering clashes between the army and the fedayeen in Amman up until 6 September. On 6 September, three planes were hijacked by the PFLP: SwissAir and TWA jets that landed at Azraq, Jordan, and a Pan Am jet that was flown to Cairo and immediately blown up after passengers were deplaned. The two jets that landed in Jordan had 310 passengers; the PFLP threatened to blow them up if fedayeen from European and Israeli prisons were not released. On 9 September, a third plane was hijacked to Jordan: a BOAC flight from Bahrain with 115 passengers was diverted to Zarqa. The PFLP announced that the hijackings were intended "to bring special attention to the Palestinian problem". After 371 hostages were removed, the planes were dramatically blown up in front of international press on 12 September. However, 54 hostages were kept by the organization for around two weeks. Arab regimes and Arafat were not pleased with the hijackings; the latter considered them to have caused more harm to the Palestinian issue. But Arafat could not dissociate himself from the hijackings, again