As Israel and Hamas move closer to a ceasefire agreement, Israel says it wants to maintain troops in a southern corridor of the Gaza Strip — a condition that could derail the talks.

Israel and Hamas are believed to have agreed that 10 living hostages and the remains of 18 others should be released during the first 60 days of a cease-fire, but they have not reached a consensus on how many Palestinian prisoners should be freed during the same period. Up to 20 hostages are still thought to be alive.

Israel and Hamas are moving toward a cease-fire agreement following a shift in the balance of power after Israel’s 12-day war with Iran.