The Security Council,

Reaffirming its resolution 696 (1991) of 30 May 1991 and all subsequent relevant resolutions, in particular resolutions 1196 (1998) of 16 September 1998 and 1219 (1998) of 31 December 1998,

Recalling the statement of its President of 23 December 1998 (S/PRST/1998/37),

Expressing its outrage at the downing on 2 January 1999 of a second United Nations-chartered aircraft over territory controlled by the União Nacional para a Independência Total de Angola (UNITA), which brings to six the number of aircraft lost in this area in recent months,

Expressing its deep concern regarding the fate of the passengers and crews of the above-mentioned aircraft, and its deep regret at the loss of life in these incidents,

Stressing that attacks against personnel who act on behalf of the United Nations are unacceptable and unjustifiable by whomsoever committed,

Deploring the lack of cooperation by UNITA in clarifying the circumstances of these tragic incidents which occurred over territory under its control and in permitting the prompt dispatch of the United Nations search and rescue mission,

Acting under Chapter VII of the Charter of the United Nations,

1. Condemns the downing of the two aircraft chartered by the United Nations, deplores the loss under suspicious circumstances of other commercial aircraft, and demands that all such attacks cease immediately;

2. Reaffirms its resolve to establish the truth about the circumstances of and to determine the responsibility for the downing of the two aircraft chartered by the United Nations and the loss under suspicious circumstances of other commercial aircraft over UNITA controlled territory through an immediate and objective international investigation of these tragic incidents, and reiterates its call upon all concerned, especially UNITA, to cooperate fully with and to facilitate such an investigation;

3. Concludes that the leader of UNITA, Mr. Jonas Savimbi, has not complied with the demands contained in its resolution 1219 (1998) of 31 December 1998;

4. Reiterates its demand that the leader of UNITA, Mr. Jonas Savimbi, cooperate immediately and in good faith in the search for and rescue of possible survivors of the above-mentioned incidents;

5. Welcomes the concrete actions undertaken by the Government of Angola to follow up the commitment made by the President of Angola to the Special Envoy of the Secretary-General on 5 January 1999 regarding the cooperation to be extended to the United Nations search and rescue efforts, and encourages it to continue to extend such cooperation;

6. Requests the International Civil Aviation Organization (ICAO) to provide all possible support to the investigation of those incidents as soon as conditions on the ground permit, and urges Member States with investigative capability and expertise to assist the United Nations upon request in the investigation of those incidents;

7. Stresses the obligation of Member States to comply with the measures imposed against UNITA contained in resolutions 864 (1993) of 15 September 1993, 1127 (1997) of 28 August 1997 and 1173 (1998) of 12 June 1998;

8. Expresses its readiness to pursue reports of violations of the measures referred to in paragraph 7 above, to take steps to reinforce the implementation of these measures and to consider the imposition of additional measures, including in the area of telecommunications, on the basis of a report to be prepared by the Committee established pursuant to resolution 864 (1993) by 15 February 1999 drawing on the expertise of relevant bodies and organizations, including the International Telecommunication Union;

9. Encourages the Chairman of the Committee referred to in paragraph 8 above to consult with the Organization of African Unity (OAU) and the Southern African Development Community (SADC) on ways to strengthen the implementation of the measures referred to in paragraph 7 above;

10. Decides to remain actively seized of the matter.