The Israeli military said Monday that Omer Maxim Neutra, an American-Israeli citizen who was previously believed to be alive and held hostage in Gaza, was killed during the Hamas-led attack on October 7, 2023.

Omer Neutra, who had Israeli and American citizenship, was doing military service in Israel when Hamas invaded. His parents have been high-profile campaigners for the hostages.

Hamas is still holding around 100 hostages inside Gaza, at least a third of whom are believed to be dead. The Biden administration says it is making another push for a ceasefire and the release of the remaining hostages, after nearly a year of indirect negotiations between Israel and Hamas repeatedly stalled.