TEL AVIV, Israel (AP) — The Israeli military said Wednesday that one of the bodies handed over by Hamas the previous day as part of the ceasefire deal is not that of one of the hostages who was held in Gaza, adding to tensions over a fragile ceasefire in the two-year war.

Four bodies were handed over by Hamas on Tuesday to ease pressure on the fragile ceasefire, following the first four on Monday — when the last 20 living hostages were released. In all, Israel was awaiting the return of the bodies of 28 deceased hostages.

The military said that “following the completion of examinations at the National Institute of Forensic Medicine, the fourth body handed over to Israel by Hamas does not match any of the hostages.”

Israeli Prime Minister Netanyahu demanded earlier Wednesday that Hamas fulfill the requirements laid out in the ceasefire deal — introduced by U.S. President Donald Trump — about the return of the hostages’ bodies.

“We will not compromise on this and will not stop our efforts until we return the last deceased hostage, until the last one,” he said.