Israel and Hamas agreed to a ceasefire deal, mediators announced Wednesday, pausing a devastating 15-month war in the Gaza Strip and raising the possibility of winding down the the deadliest and most destructive fighting between the bitter enemies.

Israel and Hamas agreed to a deal to halt fighting in Gaza and exchange Israeli hostages for Palestinian prisoners, an official briefed on the deal told Reuters on Wednesday, opening the way to a possible end to a 15-month war that has upended the Middle East.