Several people died in this weekend's attack in Istanbul.
The explosion has shaken Turkey, says Tomas Torén, SVT's correspondent in Turkey.
- It has torn up wounds from the years when Turkey was hit very hard by terrorist acts, he says in Morgonstudion.
Several people have been arrested on suspicion of aiding and abetting the crime, including a woman.
- It is said from the Turkish side that she has confessed in interrogation and that she must have been trained by Syrian-Kurdish forces.
Photos and video footage of her during and after the arrest have been circulated where it looks like she has been treated very harshly.
Stir up strong nationalist feelings
Turkey has singled out both the PKK and the PYD as being responsible for the attack.
However, both groups deny any involvement.
- One thing is certain and this is tearing up very strong nationalist feelings in Turkey.
A lot of people here direct their anger at the Kurdish PKK and at the West, which they perceive as rooting for the PKK and above all for the Syrian-Kurdish organization PYD.
- But there are also those who distrust the Turkish authorities' explanation and motives.
Turkey is accused of exploiting this for political purposes.
"Will raise the pressure on Sweden"
Tomas Torén also believes that what happened could affect the ongoing NATO negotiations between Turkey and Sweden.
- It is not at all unlikely that this will increase the pressure on Sweden to further distance itself from the PYD.
It creates pressure in this tense situation.
He also believes that the social climate will harden in Turkey.
- Social media was quickly shut down.
We have an election in Turkey next year and it could very well have major consequences regarding security policy.
The nationalist issues will play a big role in that election.
PYD is political party in the autonomous region of Rojava in Syria.
It was founded in 2003 as the Syrian branch of the PKK, the Kurdistan Workers' Party.