某甲向某乙讨债不成，遂将某乙劫持并关押月余。某甲的行为是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28406' and id < 2321438 and id<>'2321438' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28406' and id > 2321438 and id<>'2321438' order by id asc limit 5