Mystery behind Arafat's death

According to the Palestinian observer at the United Nations Nasser al-Kidwa, toxicology tests revealed no traces of poison in Arafat's blood.

"For the French authorities, medically, the file was considered closed. For us, and because of the lack of a clear diagnosis, a question mark remains and personally I believe that it will remain there for some time to come," said al-Kidwa.