The IDF discovered two letters exchanged by Hamas leaders, detailing the money received by the Islamist movement from Tehran since 2014. The letters, written by the deputy commander of the armed wing of Hamas, Marwan Issa, since killed in an Israeli airstrike last March, were signed under the name Abu al-Baraa.

They are both addressed to Abu Ibrahim, known as Yahya Sinwar, the number one leader of Hamas. The IDF considers this correspondence as proof of Iran's support for the terrorist organization behind the bloody attack in southern Israel on October 7. Iran was the first country to show its support for Hamas, the day after the attack, declaring “Iran supports the self-defense of the Palestinian nation’ ’. The money, coming from Iran, was first transferred in cash to Hamas contacts in Lebanon. Once in Beirut, the funds were allegedly transferred to Gaza using a network of money changers using various credit systems to route the money to Hamas leaders. “In the name of Allah the Merciful. To my dear brother Abu Ibrahim...” begins the second letter, this time handwritten, dated November 2021.