- \"This is a more than credible threat. This is an active plot,\" a source added.
- In an upgraded travel advisory on Monday, Israel urged its citizens visiting Turkey to leave \"as soon as possible\", predicting possible follow-up attacks.
The Islamic State plans to kill Jewish children in Turkey by attacking kindergartens, schools and youth centres.
Britain's Sky News quoted intelligence sources on Monday that reports indicate an imminent attack. This intelligence was obtained from six operatives from the 'Caliphate' who were arrested in the southern city of Gaziantep over the last week, the report from Sky Foreign Affairs Editor Sam Kiley added.
The most likely target of an attack is Istanbul's synagogue in Beyoglu, which also has a community centre and a school attached to it.
"In light of these circumstances, extraordinary security measures are being taken above and beyond the high alert level already in place by the Turkish police, as well as vigilance within the Jewish community. Undercover and other covert counter-terror measures are being implemented around the clock," an intelligence source told Sky News.
Meanwhile, news agencies haven't been able to confirm the news from Turkish officials, as of yet.
"This is a more than credible threat. This is an active plot," the source also added.
More than 80 people have been killed in a series of suicide attacks this year in Turkey, a NATO ally of the United States. The latest attack which was blamed on Islamic State, killed three Israeli tourists and an Iranian in Istanbul on 19 March. The group has also claimed responsibility for suicide blasts that killed 35 people last week in Belgium.
In an upgraded travel advisory on Monday, Israel urged its citizens visiting Turkey to leave "as soon as possible", predicting possible follow-up attacks.
With agency inputs