Israeli attack kills son of Hamas leader negotiating with Trump-led board

By Nidal al-MughrabiCAIRO, May 7 (Reuters) - An Israeli air strike has killed the son of Hamas' chief negotiator in U.S.-mediated talks over Gaza's future, a senior Hamas official said on Thursday, as leaders of the militant group held talks in Cairo aimed at safeguarding their truce with Israel.Azzam Al-Hayya, son of Khalil Al-Hayya, succumbed to his injuries on Thursday after being struck in an Israeli attack on Wednesday night, said senior Hamas official Basim Naim. He is the fourth son of Ha...