BEIRUT, Lebanon, Sept. 11 (UPI) -- Israel's failed attempt to kill Hamas' political leadership in unprecedented air strikes on the Qatari capital, Doha, will further complicate the Gaza negotiations and harden the Palestinian militant group's position, Hamas and analysts said.

The action also could put the Abraham Accords at risk and undermine Gulf countries' trust in the United States as a reliable ally and security guarantor, they said.

The attack, whether carried out with or without Washington's approval or knowledge, has moreover heightened fears among the oil-rich Gulf states about Israeli Prime Minister Benjamin Netanyahu's "Greater Israel" mission and his broader plan to reshape the Middle East -- a strategy that further threatens peace and stability in the region.

The Hamas negotiating delegation was meeting in Doha to discuss U.S. President Donald Trump's new proposal to end the nearly 23-month war in Gaza when Israeli fighter jets and drones struck residential buildings that housed several members of the Hamas Politburo on Tuesday.

Hamas said its negotiators survived the assassination attempts, but five members of the group and one Qatari security official were killed.