Yahya Sinwar, Mohammed Diab Ibrahim Al-Masri (Deif), Ismail Haniyeh On the basis of evidence collected and examined by my Office, I have reasonable grounds to believe that Yahya SINWAR (Head of the Islamic Resistance Movement (“Hamas”) in the Gaza Strip), Mohammed Diab Ibrahim AL-MASRI, more commonly known as DEIF (Commander-in-Chief of the military wing of Hamas, known as the Al-Qassam Brigades),