The outlawed Kurdistan Workers' Party (PKK) on Monday denied any role in the deadly weekend attack in Istanbul.
"Our people and the democratic public know closely that we are not related to this incident, that we will not directly target civilians and that we do not accept actions targeting civilians," the group said in a statement published by the Firat news agency.
Firat is close to the PKK, which is listed as a terror group by Turkey and its Western allies.