Hamas encouraged Iran to "activate all fronts" in a secret letter sent to the regime's new Supreme Leader Mojtaba Khamenei, KAN News reported on Sunday.
The secret letter followed a more public statement made by Hamas on Saturday, in which the terrorist group urged Iran not to target neighboring Gulf countries.
"While the group affirms Iran's right to respond to this aggression by all available means in accordance with international norms and laws, it calls upon our brothers in Iran not to target neighboring countries," Hamas stated in its more measured public response.
The secret letter, on the other hand, presented a far less diplomatic face of Hamas, announcing its intention not to allow itself to be disarmed.
"The Hamas movement stands today with all its weight behind your wise leadership in the face of the 'Zionist-American' anarchy," Hamas proclaimed.
It also dismissed those Gulf countries that had undergone normalization processes with Israel, calling them part of a "losing camp."
"They didn't even dare to protect those who found shelter in their bases," the letter said, seemingly mocking the Gulf countries, such as Yemen, in which US soldiers have been killed by Iranian missiles during Operation Epic Fury.
Hamas determined to see future victories under Iranian leadership
The letter also promised Hamas' unwavering support for Iran, alongside "our brothers in the resistance axis in Lebanon, Yemen, and Iraq."
"We'll forge, under your leadership, the next victories," Hamas told Khamenei in the letter.
The Israeli Foreign Affairs Ministry, responding to the letter on X/Twitter, pronounced it a "smoking gun."
"Proof the Palestinians betray their Arab brothers," it declared, pointing to Hamas calling other Gulf states "weak."