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Afghan authorities investigating rocket strike at wedding that killed at least 28 people

  • A injured child is treated at hospital in Helmand province, south of Kabul, Afghanistan, Wednesday, Dec.31, 2014. A rocket fired amid fighting between Taliban insurgents and Afghan soldiers killed at least 26 people at a nearby wedding party Thursday night, authorities said, a grim end to a year that saw the end of the 13-year U.S.-led combat mission there. (AP Photo / Abdul Khaliq)

    A injured child is treated at hospital in Helmand province, south of Kabul, Afghanistan, Wednesday, Dec.31, 2014. A rocket fired amid fighting between Taliban insurgents and Afghan soldiers killed at least 26 people at a nearby wedding party Thursday night, authorities said, a grim end to a year that saw the end of the 13-year U.S.-led combat mission there. (AP Photo / Abdul Khaliq)  (The Associated Press)

  • Afghan injured children are treated at hospital in Helmand province, south of Kabul, Afghanistan, Wednesday, Dec. 31, 2014. A rocket fired amid fighting between Taliban insurgents and Afghan soldiers killed at least 26 people at a nearby wedding party Thursday night, authorities said, a grim end to a year that saw the end of the 13-year U.S.-led combat mission there. (AP Photo/Abdul Khaliq)

    Afghan injured children are treated at hospital in Helmand province, south of Kabul, Afghanistan, Wednesday, Dec. 31, 2014. A rocket fired amid fighting between Taliban insurgents and Afghan soldiers killed at least 26 people at a nearby wedding party Thursday night, authorities said, a grim end to a year that saw the end of the 13-year U.S.-led combat mission there. (AP Photo/Abdul Khaliq)  (The Associated Press)

  • An Afghan wounded child is helped by people at  a hospital in Helmand province, south of Kabul, Afghanistan, Wednesday, Dec.31, 2014. A rocket fired amid fighting between Taliban insurgents and Afghan soldiers killed at least 26 people at a nearby wedding party Thursday night, authorities said, a grim end to a year that saw the end of the 13-year U.S.-led combat mission there. (AP Photo/Abdul Khaliq)

    An Afghan wounded child is helped by people at a hospital in Helmand province, south of Kabul, Afghanistan, Wednesday, Dec.31, 2014. A rocket fired amid fighting between Taliban insurgents and Afghan soldiers killed at least 26 people at a nearby wedding party Thursday night, authorities said, a grim end to a year that saw the end of the 13-year U.S.-led combat mission there. (AP Photo/Abdul Khaliq)  (The Associated Press)

An Afghan official says police are investigating a rocket strike on a wedding party that killed at least 28 people, many of them women and children.

The deputy police chief of Helmand province, Bacha Gull, says the rocket strike late Wednesday appeared to have been fired from an army checkpoint near the house in Sangin district as guests waited for the bride to arrive.

Gull says police are "keeping an eye" on two army checkpoints to determine whether the soldiers manning them were engaged in a firefight with Taliban insurgents at the time or whether they fired the rockets arbitrarily.

Gull says the strike wounded 51 people.

Sangin, in the poppy-producing Helmand River valley, has been the scene of fighting between government forces and Taliban for the past six months.