It began like any traditional wedding in southern Iran. The women arrived with their hands elaborately decorated with henna. Children played in the courtyard. A festive meal was about to be served in a room draped with carpets and pillows.

It ended when a bomb brought down the roof, turning a night of celebration into a jumble of dust-coated sandals, torn garlands and blood-soaked rugs.

Dozens of guests, according to a witness and accounts in local news media, had already arrived at the Malahi family’s home and surrounding buildings in the southern city of Kuhestak to celebrate a young bride and groom.

Around 9:30 p.m. on Tuesday, the wedding was struck by a bomb that, according to a weapons expert and a visual analysis by The New York Times, had been released by American forces as they carried out intense attacks in southern Iran. At least five wedding guests were killed, including a 6-year-old boy, and at least 67 other people were wounded, according to Iran’s Red Crescent Society, a humanitarian aid group.

Among the guests was a woman named Motahareh, whose identity was verified by The Times. The night of the wedding, she posted a selfie on Instagram from the women’s henna party the night before — beaming in perfectly applied makeup, a lilac head scarf and flowery robe.

“Last night was the first night!” she wrote. “For the coming nights, should I make these sorts of stories for you or what!!!”