Hamas accused Israel of deciding to “overturn the cease-fire agreement, exposing the prisoners in Gaza to an unknown fate,” referring to the remaining hostages. The group has yet to respond militarily to the attacks, leaving Israelis and Palestinians waiting to see whether the Palestinian group would escalate or head to the negotiating table.

Israel has launched “extensive strikes” in Gaza, saying it was hitting Hamas targets in the enclave. The attacks appeared to be the most intense assault on the enclave since a fragile ceasefire took effect in January.

Prime Minister Benjamin Netanyahu said he ordered the strikes because of a lack of progress in talks to extend the ceasefire.