The source, who spoke on condition of anonymity due to restrictions on talking to the media, said that Erdmann was called to the ministry in relation with the developments which led the municipality of the southern German town of Gaggenau to revoke permission for a hall meeting between Bekir Bozdag and the members of the Turkish community scheduled for earlier Thursday.
Erdmann was called upon the order of Foreign Minister Mevlut Cavusoglu, the source said, adding Deputy Undersecretary Mehmet Kemal Bozay expressed Turkey's discomfort over the incident.
The municipality of Gaggenau revoked its permission for the meeting earlier Thursday citing concerns of overcrowding, which prompted Bozdag to cancel his planned visit to Germany. The incident has drawn strong criticism from the Turkish government. The event was organized by the Union of European Turkish Democrats, or UETD.