Dr. Ussama Al-Mulla, a professor of dentistry at Baghdad University, was arrested by Iraqi security personnel on February 17, 2008, along with two other professors and four members of university staff, in a raid of the dentistry faculty in which staff were threatened at gunpoint and students beaten. The reasons for the arrests have not been reported, but it is said to be connected with the death of the previous dean. There have been reports that US soldiers raided the faculty the week before. The others arrestees were subsequently released, but Ussama is still being held in an unknown location without charge or trial. Amnesty International has reported that he is at risk of torture.