Simplify the following text for a Grade 9 native English-speaking person.
Original: In 1972 , when the Summer Games were held in Munich , Bavaria , Germany , eleven members of the Israeli Olympic team were taken hostage by the terrorist group Black September in what is now known as the Munich massacre .
Simplified: In 1972 , when the Summer Games were held in Munich , West Germany , eleven members of the Israeli Olympic team were taken hostage by the terrorist group Black September . This event is now known as the Munich massacre .