The Turkish intelligence agency has busted a network of 15 Islamic State (ISIS) operatives, who allegedly planned to carry out terrorist attacks against the embassies of Sweden and the Netherlands in Istanbul, i24NEWS reported on Saturday, citing Turkey's Hürriyet news agency.

The attacks were plotted as retaliatory measures to protests in those countries where Quran books were set on fire by anti-Muslim extremists, the report said, adding that the operatives plotted attacks on synagogues and churches in Istanbul.

Last week, the US embassy in Turkey issued a warning regarding possible attacks against churches, synagogues and diplomatic missions following the Quran-burning incidents.

The alert said that "possible imminent retaliatory attacks by terrorists" could happen in Istanbul's main touristic neighborhoods such as Beyoglu, Galata, Taksim and Istiklal. It added that Turkish authorities are conducting an investigation.

Turkey regularly detains ISIS suspects, many who allegedly planned attacks in the country.

In June of 2018, Turkish President Recep Tayyip Erdogan revealed that his country captured the wife of former ISIS leader Abu Bakr al-Baghdadi in an operation.

A Turkish official later said the wife revealed “a lot of information” about the jihadist group’s “inner workings” after she was captured.

Turkey has also captured Rasmiya Awad, the sister of Baghdadi, as well as her husband and daughter-in-law.

This past September, Turkey arrested a senior executive of ISIS known as Abu Zeyd.

In June of 2022, Turkish police detained two ISIS suspects wanted by Interpol in the capital Ankara. One of the two suspects was allegedly involved in recruiting people to ISIS through social media.

A month earlier, Turkey detained at least 14 ISIS suspects in police raids in two provinces.