With hours left to go before a truce in Gaza expires, international mediators worked to extend it to facilitate the release of militant-held hostages and Palestinians imprisoned by Israel. The cease-fire has paused the deadliest fighting between Israel and Palestinians in decades. Israel has agreed to extend the truce, which was originally set to expire on Monday, by one day for every 10 hostages freed, and Hamas is expected to release another group of hostages later Wednesday. Twelve hostages, including 10 Israelis, were released Tuesday, bringing the total number of people freed during the truce to 81. Israel has vowed...