The invitation comes as the US administration moves forward with formalising the "Board of Peace" structure linked to Trump's broader Gaza roadmap.
The Israeli military said it carried out the attack on Saturday near Gaza City, claiming Saad was the target.
The United Nations Security Council has adopted a draft resolution endorsing United States President Donald Trump's Gaza peace plan and authorising the establishment of an international stabilisation force in the enclave, with the American leader describing it as a 'moment of true historic proportion'.
