RAMALLAH, West Bank — President Mahmoud Abbas of the Palestinian Authority said on Sunday that Israel had killed the Oslo Accords and angrily assailed the Trump administration over its handling of the conflict. He vowed to reject American leadership of any peace talks and urged Palestinians to reconsider their signed agreements with Israel.

“We will not accept for the U.S. to be a mediator, because after what they have done to us — a believer shall not be stung twice in the same place,” Mr. Abbas said.

“The deal of the century is the slap of the century,” he added, mocking the still-undefined peace initiative that the Trump administration has been working on and promoting in the region. “However, we’ll get back at them.”

Mr. Abbas, 82, stopped well short of embracing an alternative to a two-state solution, the project around which he has built his career. The number of Israelis and Palestinians who hold out hope that such a solution can be achieved is dwindling, but Mr. Abbas said nothing about abandoning it.