Catatan B'Tselem (diterjemah daripada bahasa Inggeris)
Syahid ditembak tentera Israel semasa tembak-menembak yang tercetus selepas mereka memasuki bandar itu. Khalifah ialah anggota Briged Syuhada al-Aqsa, dan salah seorang pengasas Katibat al-’Ein.
Teks asal
Fatally shot by Israeli forces during a fire exchange that erupted after they entered the city. Khalifah was an al-Aqsa Martyrs’ Brigade operative, and one of the founders of Katibat al-’Ein.