A Palestinian farmer was killed and another injured on Sunday after they were targeted by Israeli forces in the Maghazi refugee camp in the center of Gaza, the Palestinan Red Crescent said as a truce between Israel and Hamas fighters entered a third day.

There was no immediate comment from Israel on the report and it was not clear if it would impact the latest phase of plans to swap 50 hostages held by the Palestinian militant group for 150 prisoners in Israeli jails over a four-day period.

Thirteen Israelis and four Thai nationals arrived in Israel early on Sunday after a second release of hostages held by Hamas following an initial delay caused by a dispute about aid delivery into Gaza.

Although the issue was resolved through mediation by Egypt and Qatar, it underscored the fragility of the truce, the first halt in fighting since Hamas fighters rampaged through southern Israel on Oct. 7, killing 1,200 people and taking about 240 hostages.

In response to that attack, Israel has vowed to destroy the Hamas militants who run Gaza, bombarding the enclave and mounting a ground offensive in the north. Some 14,800 people, roughly 40 percent of them children, have been killed, Palestinian health authorities said on Saturday.

Israel had said the cease-fire could be extended if Hamas continued to release at least 10 hostages a day. A Palestinian source had said up to 100 hostages could go free.

The armed wing of Hamas announced on Sunday the killing of four of its military commanders in the Gaza Strip, including the commander of the North Gaza brigade Ahmad Al Ghandour. However, it was not clear when they had been killed.

Television images showed freed hostages on the Egyptian side of the Rafah border crossing after leaving Gaza as Hamas handed the captives to the International Committee of the Red Cross late on Saturday.

Six of the 13 Israelis released were women and seven were teenagers or children. The youngest was three-year-old Yahel Shoham, freed with her mother and brother, although her father remains a hostage.

“The released hostages are on their way to hospitals in Israel, where they will re-unite with their families,” the Israeli military said in a statement.

Meanwhile, a second group of captives were released by Hamas late Saturday night in exchange for Palestinian prisoners held by Israel after United Nations’ aid trucks reached northern Gaza.

Despite the four-day ceasefire, Al Jazeera reported Israeli forces were warning Gazans from heading north. A Palestinian journalist said on Sunday IDF forces were arresting and shooting Palestinians in northern Gaza.