The blood feud stands behind unknown men's opening fire at participants of the wedding ceremony in south-western Turkey, BBC quoted Turkish Interior Minister Bashir Atalay as saying.
Minister said 8 people have been detained.
In the Turkish village Sultanshehmuz in Mardin province unknown armed men attacked on a group of people, celebrating a wedding, killing 45 people and wounding 6, CNN Turk quoted Interior Ministry as saying.
The death toll includes women and children. About 21 of the dead are members of the Chelebi family, CNN Turk reported.
"What happened is not like a terrorist act", Cihan reported the Assistant Governor of Mardin province Mehmet Bashir Ayanogli as saying.
Interior Minister Beshir Atalay also said he does not consider the attack an act of terrorism. "It is suggested that the attack is not an act of terrorism. The prosecutor's office is investigating all options in detail," minister said.
Interior minister, minister for justice and rural issues paid an emergency visit to the scene of incident. Prime Minister Erdogan will oversee the investigation, CNN Turk reported.
Grenades and long-boled arms were used during the attack.
The injured taken to hospital. Law enforcement officers arrived At the scene of the crime. Investigation is under way.