Complex sentence: Two people who came to his assistance were struck by another missile, killing one, Fadi Mohammed Zo'rob (23) instantly, and the other, Haitham Ashraf Zo'rob (20), five hours later in hospital.
Split into simpler sentences: Two people who came to his assistance were struck by another missile, killing one, Fadi Mohammed Zo'rob (23) instantly. The other, Haitham Ashraf Zo'rob (20), died five hours later in hospital.