A group of armed men attacked a wedding party in south-eastern Turkey, killing at least 44 people.
Six children and 16 women died when attackers wielding automatic rifles and grenades burst into a celebration in a village in Mardin province.
Turkey has fought Kurdish separatists in the area for 25 years, but this attack has been linked to a local "blood feud" and a pro-Turkish militia.
Eight people were arrested with weapons, the interior minister said.
Besir Atalay said investigators had spent the night speaking to eyewitnesses in an effort to identify those responsible.
Some media is suggesting that the deaths were a result of a fight between families of the bride and groom.
The fate of the bride and the groom is not known.