“The person who planted the bomb has been arrested. According to our conclusions, the PKK terrorist organization is responsible” for the attack, said Mr. Soylu in a nocturnal statement, relayed by the official Anadolu agency and the local televisions.

The attack, which has not been claimed, killed six people and injured 81, half of whom had to be hospitalized.

It occurred in the middle of the afternoon in this ultra-popular pedestrian street on Sundays, which Istanbulites and tourists walk around.

Mr. Soylu did not specify the conditions under which this suspected “person” was arrested, nor whether it is a “woman” as President Recep Tayyip Erdogan had affirmed on Sunday evening and then his deputy. President Fuat Oktay.

The Minister of Justice, Bekir Bozdag, then referred to a “bag” placed on a bench: “A woman sat on a bench for 40 to 45 minutes, and some time later there was an explosion. All data on this woman is currently under review,” he continued.

“Either this bag contained a timer or someone activated it remotely,” he added.

President Erdogan was the first to denounce a “vile attack”, just before flying to Indonesia and the G20 summit in Bali: “The first observations suggest a terrorist attack”, said the head of state , adding that “a woman would be involved in it”.

“The perpetrators of this vile attack will be unmasked. Let our people be sure (that they) will be punished”, promised Mr. Erdogan who had already faced a campaign of terror across the country in 2015-2016.

– PKK et Otan –

The explosion, of strong power and accompanied by high flames, was heard from afar and triggered a movement of panic among the many onlookers.

“People were running in panic. The noise was huge. There was black smoke. The sound was so loud, almost deafening,” witness Cemal Denizci, 57, who saw several people, told AFP. lying on the ground.

The PKK, considered a terrorist organization by Ankara but also by its Western allies including the United States and the European Union, has been in armed struggle against the Turkish government since the mid-1980s. It has often been held responsible by history of bloody attacks on Turkish soil.

In December 2016, a double attack near the Besiktas football stadium in Istanbul – 47 dead including 39 police officers and 160 injured – was claimed by the Kurdistan Freedom Falcons (TAK), a radical Kurdish group close to the PKK.

The PKK is also at the heart of a showdown between Sweden and Turkey, which has been blocking Stockholm’s entry into NATO since May, accusing it of leniency towards the PKK.

Ankara demanded the extradition of several of its members in a memorandum of understanding signed in June with Sweden and Finland, another Nordic country wishing to join the Atlantic Alliance.

Swedish Prime Minister Ulf Kristersson visited Ankara last week and promised Mr Erdogan to address Turkey’s “concerns”.

The Swedish Parliament is also preparing to vote to change the constitution in order to toughen its anti-terrorist legislation.

The PKK is also regularly targeted by Turkish military operations against its bases in northern Iraq and Syria.

Last month, many accusations relayed by the opposition and Turkish observers, but denied by the authorities, referred to the use of chemical weapons by the Turkish army against PKK fighters who published a list of 17 names , accompanied by photos of people presented as “martyrs” killed by poison gas.