In addition to the personnel listed above, UNIFIL was assisted by 72 military observers of the United Nations Truce Supervision Organization (UNTSO). The ni.,mber of observers, which had been temporarily re­ duced because of operational requirements of UNTSO in Beirut [see S/15455, para. 5], was brought back up to strength on 20 December 1982. The observers were under the operational control of the Com,1J1ander of UNIFIL, Lieutenant-General William Callaghan. 16 [Original: English] [13 January 1983] · 4. As previously indicated [ibid., para. 21 ], the Nepalese battalion left UNIFIL, and its withdrawal was completed by 18 November: The new Finnish battalion [see S/15468 and S/15469] completed its de­ ployment on 11 December. On 8 November, the Gov­ ernment of Nigeria informed the Secretary-General that it would discontinue its participation in UNIFIL . after the expiration of the current mandate. Two Niger~ ian companies, comprising 250 all ranks, were repat­ riated on 10 November at the end of their regular tour of duty. The French infantry unit remained at reduced strength in accordance· with the temporary arrange­ ment releasing the greater part of the unit to the French authorities [see S/15455, para. 4]. 5. During the reporting period, six members of the Force lost their lives. Three Irish soldiers were killed in a shooting incident under circumstances which are still. being clarified. One Finnish and two Ghanaian soldiers died as a result of accidents. Since UNIFIL was established, 89 members of the Force have died, 40 of them as a result of firing or mine explosions, 39 in accidents and 10 from natural causes. Some 120 have been wounded in armed clashes, shellings and mine explosions. 6. As a result of the movement of units reported in paragraph 4 above, some changes had to be made to 