berlin another german couple believe detain turkey weekend one individuals remain police custody bar leave country german foreign ministry spokesman say monday spokesman martin schaefer tell news conference germany official information arrest occur sunday istanbul say random nature continue detentions ankara cause utmost concern nightmare continue face many german citizens want nothing spend vacation turkey say schaefer hit anyone think enter turkey one believe oneself danger suddenly one turkish prison schaefer say travel turkey aware potential dangers say berlin immediate plan issue formal travel warn draw use travel guidance political manner schaefer say add continue random arrest turkey german citizens could force berlin issue warn would put turkey par libya yemen syria add foreign ministry urge german citizens since july 26 exercise caution travel turkey monday news additional arrest 10 germans detention turkey include german-turkish journalist deniz yucel hold 200 days schaefer downplay relevance turkey warn saturday citizens take care travel germany say warn nothing reality 80 million german citizens ethnic turks live eu commissioner guenther oettinger separate remark reject call break discussions ankara accession european union say move would strengthen president tayyip erdogan fire brussels crackdown opponents fail coup last week german chancellor angela merkel expect win fourth term sept. 24 election infuriate erdogan government call formal halt turkey stall eu accession talk late concede move would decide unanimously eu tensions berlin ankara run high year fuel part conflict lawmaker visit german troop station turkey ankara crackdown allege supporters last year coup germans detain turkey german foreign ministry