Three Palestinians were killed, seven others were injured early Tuesday in an Israeli air strike at underground tunnels in southern Gaza Strip's Rafah, sources told Kuwait News Agency "KUNA". Director of Emergency and Ambulance Services in the Ministry of Health, Dr. Muawiyya Hasanain told KUNA, "Three others were injured when the fighter jets dropped two bombs between Rafah and Egypt, targeting the underground tunnels, inside which the injured were working."