Sigmar Gabriel told Sunday's Bild am Sonntag newspaper that "if Turkey cannot or will not do that at Incirlik (air base) for reasons of domestic politics," the countries should seek an amicable agreement on ending the German troops' presence.
Gabriel is travelling to Turkey on Monday for talks on the impasse. Turkey, angered by German authorities' decision to grant asylum to soldiers it accuses of participating in last year's failed coup, blocked a request for lawmakers to visit.
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