Migrants at a passthrough point in RoszkeMigrants are examined by Hungarian policemen at a passthrough point in Roszke , 180 kms southeast from Budapest , Hungary , 18 September 2015 . Hungary on 15 September sealed the last gap in the barricade along its border with Serbia , closing the passage to thousands of refugees and migrants still waiting on the other side and some groups decided to pass over Croatia . Hungarian Prime Minister Viktor Orban told state radio on 18 September that work began to extend a fence already built along the border with Serbia to the border with Croatia . He added that 1 , 600 soldiers will be working on the first 42 - kilometre segment by the weekend . Hungary ' s border with Croatia is 355 kilometres long . EPA / TIBOR ROSTA HUNGARY OUT ▶ [ 현장 영상 ] ' 아이 들 을 던진 이유 '… 중국 유치원 화재 ▶ [ 오늘 의 핫 화보 ] ' 전쟁 가능 法 ' 日 안보 법안 강행 … 아베 정권 ' 비판 고조 ' < 저작권자 ( c ) 연합뉴스 , 무단 전재 - 재 배포 금지 >