Wedding guests fired into the air in a celebration of the happy couple. Soon, 23 people were dead.
The shots at the event in Saudi Arabia struck an electrical pole, which then collapsed, sparking a fire, according to state media.
In addition to the dead, more than two dozen people were injured.
Most of those killed were women, according to Al Ekhbariya TV. The wedding was in Bqaiq governorate in the eastern part of the kingdom.
Prince Mohammed bin Fahd bin Abdulaziz, governor of the eastern region, offered his condolences and ordered an investigation, the Saudi Press Agency reported.