Seven members of the peacekeepers force, Multinational Force and Observers (MFO) in the Egyptian Sinai were killed on Thursday in a plane crash.
The helicopter of the U.S. led force was said to be on routine mission when it crashed.
A mechanical failure may have caused the accident, according to findings.
The MFO statement said the helicopter was on a “routine” mission when it crashed. The Israeli military said in a statement it had offered to send a rescue team to the scene.
Those killed were five Americans, a French national and a Czech national, all of them military service members, the MFO said in a statement. It added that one American MFO member survived and was medically evacuated.
The Czech Defence Ministry released a statement confirming a Czech army member was among those killed in the helicopter crash. The statement said the cause of the crash was a technical fault.
In a tweet, the U.S. Defence Department said its initial report of six service members was incorrect and that five U.S. service members had been killed and one hospitalized.
The Israeli military said it evacuated the injured peacekeeper to a hospital in Israel.
According to its website, the MFO draws personnel from 13 countries and covers an area of more than 10,000 square kilometres (3,860 square miles) in the Sinai.
The MFO was installed to monitor the demilitarization of the Sinai under the 1979 Egyptian-Israeli peace accord. It has decreased in size in recent years as the neighbouring countries tightened security cooperation against Islamist-led Sinai insurgents.