According to the Yemen Observer Khamis was arrested on December 24, 2005, when he tried to approach the US Ambassador, while armed with a pistol and two hand grenades.
ɐkˈoːɹdɪŋ tə ðə jˈɛmən əbzˈɜːvɚ kˈɑːmiz wʌz ɚɹˈɛstᵻd ˌɔn dᵻsˈɛmbɚ twˈɛnti fˈoːɹ, tˈuː θˈaʊzənd fˈaɪv, wˌɛn hiː tɹˈaɪd tʊ ɐpɹˈoʊtʃ ðə jˌuːˈɛs ɐmbˈæsədɚ, wˌaɪl ˈɑːɹmd wɪð ɐ pˈɪstəl ænd tˈuː hˈænd ɡɹənˈeɪdz.