Top leaders of Palestinian Islamist group Hamas launched their Oct. 7, 2023, attack on Israel aiming to torpedo peace negotiations between Israel and Saudi Arabia, according to minutes of a high-level meeting in Gaza that Israel's military said it discovered in a tunnel beneath the enclave. Days before the assault that left nearly 1,200 dead, Yahya Sinwar, Hamas's Gaza chief, told fellow militants that an "extraordinary act" was required to derail the normalization talks that he said risked marginalizing the Palestinian cause, the document, reviewed by The Wall Street Journal, said.