Israeli fire killed three people near a ceasefire line in Gaza on Monday, medics said, with U.S. envoys expected in Israel to try to push forward the fragile truce that faced its gravest test so far over the weekend.

Israel says the remains of Eliyahu Margalit, a hostage handed over by Hamas, have been identified. Margalit, 76, was abducted on October 7, 2023, when Hamas attacked Israel.

The U.S.-led ceasefire between Israel and Hamas is under strain as both sides exchange attacks, with President Trump stating the situation is under review.

Israel accused the militant group of violating the truce, while Hamas’s armed wing denied mounting any attack on Israeli troops.

The US State Department said it informed countries involved in the Gaza peace agreement that an attack by Hamas is being planned against Palestinians and that it would be a violation of the ceasefire deal.