E/CN.4/1989/15 page 14 population and the population of the territories against such violence, which involved the use of force. The Israeli authorities had taken all the necessary steps to ensure that the use of force was limited and proportionate to the situation. Where cases of excessive force had occurred, they had been investigated and, where necessary, those accused of such offences had been tried and, if found guilty, punished. However, such cases were not to be considered a general tendency, as had been alleged. Kenya 62. On 6 April 1988, a l e t t e r was addressed t o the Government of Kenya transmitting information alleging that Peter Karanja was arrested on 6 February 1987 in Nakuru by the p o l i c e , but was not charged with a crime. Mr. Karanja allegedly died on 28 January 1987 in the Kenyatta Hospital a t Nairobi as a r e s u l t of t o r t u r e . Mexico 63. On 25 October 1988, a l e t t e r was addressed t o the Government of Mexico transmitting information alleging t h a t , according to information received on 14, 15 and 16 February 1988, s o l d i e r s from the 6th A r t i l l e r y Regiment with headquarters in Matias Romero were patrolling the area of Aserradero Viejo and Estancion Malatengo de los Egidos de Piedra Blanca and El Zorzal, in the municipality of San Juan Guichicovi. I t was alleged t h a t during t h a t m i l i t a r y exercise s o l d i e r s mistreated the l o c a l population. Within that context, the case of Gregorio Castanon Lopez, 31 years old and living in Mogofie Viejo, Municipio de San Juan Guichicovi, was brought t o the a t t e n t i o n of the Special Rapporteur. According t o information he was detained on 16 February 1988 by a s o l d i e r , whose name was transmitted t o the Government. I t was alleged that Mr. Lopez was severely beaten and his head was submerged in water. Medical c e r t i f i c a t e s issued by the I n s t i t u t o Regional de Seguridad de Servicios Sociales de Tehuantepec (Tehuantepec Regional Safety and Social Services I n s t i t u t e ) c e r t i f i e d t h a t , a t his medical examination, Mr. Castanon Lopez showed v i s i b l e i n j u r i e s on the neck, arms and legs as a r e s u l t of t o r t u r e . Morocco 64. On 28 April 1988, a l e t t e r was addressed to the Government of Morocco transmitting information alleging that Dahbi Machrouhi and Najib Hamdani, sentenced to 10 and 6 years' imprisonment, respectively, were the victims of an a s s a u l t on 29 January 1988. On 1 April 1988, the Ministry of J u s t i c e issued a statement regarding the circumstances of the incident and s t a t i n g that the two prisoners had sent for the Deputy Prison Director on 29 January 1988 and made a number of requests concerning prison conditions, for example with regard to insufficient medical treatment and r e s t r i c t i o n s on t h e i r right to receive v i s i t s , which he could not f u l f i l as they were said to be in violation of prison administration regulations. I t was further stated t h a t the two prisoners together with five others had insulted and attacked the Deputy Prison Director. As a consequence, they were i l l - t r e a t e d by the prison guards and put in i s o l a t i o n c e l l s for several days. In p r o t e s t they began a hunger-strike, Hamdani on 8 February and Machrouhi on 11 February 1988. I t was said t h a t the prison doctor had not seen them since the beatings and throughout the time they had remained in prison. Subsequently they were brought t o Ibn Rachid Hospital in Casablanca and on 8 April 1988 they were returned t o prison.