No journalists are put into detention here.
Chancellor Angela Merkel, campaigning for a September 24 general election, dismissed the advisory, saying Germany stood for "freedom of speech and the rule of law". "You expect no danger and suddenly you're in a Turkish prison - that is the sad reality we are confronted with".
It is not known what the pair were arrested for, but Schaefer added one has apparently been released and told to leave Turkey.
The German spokesman stated that even though Germany has received no official information on the matter, the random detentions by Turkish authorities cause the "utmost concern".
Turkey's travel warning is the latest in a series of several retaliatory moves made as tensions soar between Germany and Turkey.
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According to the statement of the Turkish foreign ministry the German political leaders' pre-election campaign is based on anti-Turkish principles.
Germany had updated foreign ministry travel advice in July to warn citizens that they could face arrest if they travel to Turkey. Her center-left challenger, Martin Schulz, said he would seek to end Turkey's membership talks with the European Union. "Nazi comparisons offend our honour!" he said, referring to previous exchanges between Ankara and Berlin, in which Turkish President Recep Tayyip Erdogan repeatedly accused the German government of employing "Nazi practices".
Erdogan later issued a statement to Turks in Germany - of whom about 1 million have the right to vote in the upcoming election - not to cast their ballots for Germany's three major parties.
Though Germany has not issued a formal travel warning, the Foreign Office maintains a travel alert on its website telling Germans to exercise caution when vacationing in Turkey.
On Sunday, Merkel rejected the premise of the Turkish travel warning, news agency dpa reported.