3 American Doctors Killed by Guard at Afghan Hospital --- KABUL, Afghanistan — An Afghan policeman shot and killed three American doctors at a hospital here on Thursday, according to Afghan police officials. -- The attack took place at the Cure International Hospital in Kabul, a 100-bed facility that specializes in treating disabled Afghans, and has a maternal care unit with support for premature births. The policeman had recently been assigned to guard the hospital. -- Sediq Seddiqi, a spokesman for the Ministry of Interior, said the Afghan guard was shot and wounded in the incident, and was being treated in the hospital and was under guard. However, another Afghan official, speaking on condition of anonymity, said the policeman tried to shoot himself with his own weapon after the attack. -- Cure, a Christian-based charity, runs hospitals in 10 countries. -- Mr. Seddiqi said the motive for the attack was unknown. A police official identified the killer as Ayudin, from Laghman Province, a two-year veteran of the police force in Kabul; like many Afghans, he goes by only one name. - More, ROD NORDLAND and HABIB ZAHORI, NYTimes