Turkey has "no clue" about who was behind the attack on a Kurdish wedding in a city close to the Syrian border that left 54 people dead, the prime minister said on Monday.

"We do not have a clue about who the perpetrators behind the attack were. Early information on who did the attack, in what organisation's name, is unfortunately not right," Prime Minister Binali Yildirim told reporters in Ankara, after President Recep Tayyip Erdogan said the bomber was a child aged between 12-14 acting on orders of Islamic State (IS) jihadists.