Saturday's attack in the southeastern city of Gaziantep is the deadliest in Turkey this year. President Tayyip Erdogan said on Sunday it was carried out by a suicide bomber aged between 12 and 14, adding that initial evidence pointed to Islamic State.
But speaking to reporters in Ankara on Monday, Prime Minister Binali Yildirim said it was too early to verify the organisation responsible or whether the attack was carried out by a child.
A senior security official told Reuters the device used was the same type as those employed in the July 2015 suicide attack in the border town of Suruc and the October 2015 suicide bombing of a rally of pro-Kurdish activists in Ankara.
Both of those attacks were blamed on Islamic State. The group has targeted Kurdish gatherings in an apparent effort to further inflame ethnic tensions strained by a long Kurdish insurgency. The Ankara bombing was the deadliest of its kind in Turkey, killing more than 100 people.
"Daesh should be completely cleansed from our borders and we are ready to do what it takes for that," Foreign Minister Mevlut Cavusoglu said at a news conference in Ankara, using an Arabic name for the group.
The pro-Kurdish Peoples' Democratic Party said the wedding party was for one of its members. The groom was among those injured, but the bride was not hurt.
On Monday, Turkey's military launched howitzer attacks on Islamic State while artillery pounded Kurdish YPG militants in Syria, whom Ankara sees as an extension of its own Kurdish insurgency. An official said the strikes were designed to "open a corridor for moderate rebels".
A senior rebel official said Turkish-backed Syrian rebels were preparing to launch an attack to seize Jarablus from Islamic State, a move that would deny control to advancing Syrian Kurdish fighters.
The rebels, groups fighting under the banner of the Free Syrian Army, are expected to attack Jarablus from inside Turkey in the next few days. Reuters TV footage showed around 10 Turkish tanks deployed at a village around 4km from the border gate immediately across from Jarablus. It was not clear how long the tanks had been there.
Prime Minister Binali Yilidirm has said Turkey would take a more active role in Syria in the next six months to prevent the country from being divided along ethnic lines.
For Ankara, Islamic State is not the only threat across its frontier. Turkey is also concerned that attempts by Syrian Kurds to extend their control along the common border could add momentum to an insurgency by Kurds on its own territory.
