E/CN.4/1990/17 page 32 had been tortured in custody. Three of them had later been released. The fourth had died in November 1988, allegedly from injuries sustained under torture. He was named as Osborne Mkandwaire, aged 37, who was reportedly employed by the Department of Information, in the Office of the President and Cabinet. Hali 99. On 2 October 1989 the Special Rapporteur addressed a letter to the Government of Mali transmitting information that Mr. Adama Bantjini Coulibaly and Mr. Souleymane Dembele, two students at the National Engineering School, were arrested by security forces on 19 June 1989 and reportedly held without charge in the "Commando Camp" at Djikorani, near Bamako. According to the same source, they were tortured and suffered other ill-treatment. Two other students from the same school, whose names have not'been reported and, according to the same source, were arrested at the same time as Mr. Coulibaly and Mr. Dembele, are said to be held at State Security Headquarters in Bamako. The four students are reportedly being held incommunicado and are unable to receive visits from their family or lawyer. Mauritania 100. On 25 July 1989 the Special Rapporteur sent an urgent message to the Government of Mauritania stating that Mr. Abdallah Ould Bah Nagi Ould Kebd, Chairman of the Students Union at the University of Nouakchott and a member of the Independent Democrats Organization, was arrested on 29 May 1989 and reportedly held incommunicado, without charge or trial, in a building belonging to State Security at Hot K, Nouakchott. According to the information recieved, Mr. Ould Kebd was ill-treated and tortured by members of the Security Forces after he was arrested. Neither his family nor his lawyers are entitled to visit him. In addition, Mr. Ould Kebd, together with four other students arrested in December 1988 after a strike at the University, are said to have been severely tortured, more particularly by the method known as the "jaguar11. 101. On 20 July 1989 the Special Rapporteur sent an urgent message to the Mauritanian Government stating that a number of officials, including Mr. Oumar Tall, aged 22, Mr. Amadou Tidiane Ly, aged 39, Mr. Mamadou Diop, aged 40, and Mr. Abdoulaye Wane, had been arrested in various towns and held incommunicado by the police since May 1989. According to the information received, they were being held without charge in Nouakchott in houses used by the security police as interrogation centres. These persons were reportedly tortured during detention, more particularly by the method known as the "jaguar". 102. On 2 October 1989 the Special Rapporteur addressed a letter to the Mauritanian Government transmitting information that, after a strike movement at the University of the Nouakchott, on 28 December 1988 the State Security departments apprehended dozens of students said to be among the leaders of the movement. The students were reportedly taken to a detention centre in an isolated industrial zone and were tortured for several days. The names of two of the persons alleged to be responsible were transmitted to the Government. The tortures included kicking, truncheon blows, whipping the soles of the feet and other parts of the body, being strung up by the legs over an iron bar, with the arms bound over the legs and the head hanging down (the "jaguar"