Although both countries continued to lay claim to the land, joint control of the area remained in effect until 1992, when Egypt objected to Sudan's granting of exploration rights for the waters off the Triangle to a Canadian oil company. Negotiations began, but the company pulled out of the deal until sovereignty was settled. In July 1994, Sudan sent memoranda to the United Nations Security Council, the Organisation of African Unity (OAU) and the Arab League complaining about what it claimed was more than 39 military and administrative incursions by Egypt into Sudanese territory since Sudan had last filed memoranda in May 1993. In January 1995 Egypt rejected a Sudanese request for the OAU Foreign Ministers' Council to review the dispute at their meeting in Addis Ababa. Then, after an unsuccessful assassination attempt on Egyptian President Hosni Mubarak when he arrived in Addis Ababa to attend the meeting, Egypt accused Sudan of complicity, and, among other responses, strengthened its control of the Halaib Triangle, expelling Sudanese police and other officials.