Displaced Palestinians have started returning to their homes in Gaza after more than 15 months of war, with images emerging of the scale of the damage. Meanwhile, aid workers have warned of the major hurdles ahead.

Three hostages and 90 Palestinian prisoners were released as part of the first phase of a long-awaited Gaza ceasefire deal between Israel and Hamas. Over the next six weeks, 30 more hostages are expected to be released, as are hundreds of Palestinian prisoners.

The Israeli military has withdrawn from several locations in Gaza since the truce began, an Israeli military official told CNN. However, the day after the ceasefire went into effect, the Israeli military shot and injured a Palestinian teenager in central Gaza, according to journalists working with CNN Monday.