JERUSALEM (Reuters) - A helicopter with the U.S.-led Multinational Force and Observers (MFO) in the Egyptian Sinai crashed on Thursday near the resort town of Sharm el-Sheikh, killing seven members of the peacekeeper force, the MFO said.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. An earlier statement had said that eight peacekeepers were killed, including six Americans. An official briefed on the incident, who could not be identified by name or nationality, told Reuters it was an accident caused by mechanical failure. 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.