Terrorists tried to force the release of PERSON@1 and ten other imprisoned ORGANIZATION@1 members by kidnapping PERSON@2 on NUMBER@1 September NUMBER@2 , as part of the sequence of events known as the `` MISC@1 Autumn '' , which began on NUMBER@3 July NUMBER@2 with the murder of the banker PERSON@3 .

PERSON@2 was kidnapped on NUMBER@1 September NUMBER@2 and ORGANIZATION@2 Flight NUMBER@4 was hijacked in mid-October to try to force the release of PERSON@1 and ten other ORGANIZATION@1 members .
