Turkish media reported on Saturday that over a dozen people were detained during a joint operation of intelligence and law enforcement forces against IS members. A total of 15 people were reportedly arrested, suspected of receiving instructions from IS branch "Vilayet Khorasan"* regarding the consulates of Sweden and the Netherlands, as well as Christian and Jewish religious sites in Istanbul.
Turkey’s national public broadcaster said later on Saturday that the 15 people who were arrested did have ties to IS, but suspected threats to the consulates and religious sites were not confirmed.
On Friday, Turkish Foreign Minister Mevlut Cavusoglu said that it was difficult to call the countries that had decided to close their consulates in Istanbul because of an alleged terrorist threat allies and friends.
Earlier in the week, Sweden, the Netherlands, Germany, France, Switzerland and the UK all suspended operations at their consulates in Istanbul, citing security concerns, after a series of Quran-burning protests in northern Europe. The US and several other countries issued travel warnings.
Islamic State (also known as ISIS/ISIL/Daesh) is a terrorist organization banned in Russia and many other states.