Starting from the 4th Maccabiah, the games were changed to take place every four years in the year following the Olympics. The 15th edition was marred by what became known as the Maccabiah bridge disaster, when a temporary bridge built for the march of athletes at the opening ceremony collapsed, plunging about 100 members of the Australian delegation into the waters of the Yarkon River. Four athletes were killed, and 63 injured. More than 5,000 participants from over 50 countries competed in those Games.