Istanbul explosion: overview of this year's surge in violence and terror attacks in Turkey

Istanbul explosion: overview of this year's surge in violence and terror attacks in Turkey. As no claim of responsibility has been issued for the blast in Istanbul, three main suspects have been unveiled: the Islamic state group, eager to take revenge on Turkey for its harder line on the terrorist organisation, the PKK, for the continuing fight against the Turkish army, and extreme-leftist groups that have an history of violence in the country.