One of the first things the Islamic State (IS) did after capturing Mosul was to seize the Turkish consulate in the city and take 49 Turkish nationals, including the consul general, hostage.
As the government tends to do whenever faced with unpleasant issues, it arranged for a court to impose a gag order on all reporting about the hostage issue — hence the low-key coverage. The Turkish media in general prefers to remain silent, reporting only on government officials saying they expect them to be released soon.