Press TV reports.
The incident occurred during a US-led raid in the early hours of Friday in Paktia's Sayid Karam district, provincial spokesman Ruhollah Samoon stated.
Nine people were also arrested in the operation, the spokesman added, noting that the operation was carried out without coordination with Afghan officials.
Local sources and witnesses blamed the foreign forces for the attack on the wedding party, and accused them of mistreating the civilians and even seizing the bride's jewelry and cash.
Afghan authorities also criticized the raid against the civilians and launched an investigation into the incident and the witnesses' allegations.
The Paktia attack comes a few days after a similar operation in the Alingar district of Laghman Province, where US-led troops killed seven women and a child and injured 19 others.
Afghan tribal leaders have been accusing US-led foreign troops of storming Afghan people’s homes and take them to unknown places without coordination with local authorities.
The pre-dawn attacks on civilian houses have been a source of tension in Kabul's ties with Washington and NATO, with the Afghan side repeatedly calling for an end for the controversial operations.
US-led forces have killed an Afghan citizen in an overnight attack on a wedding party in the country's eastern province of Paktia,