KHOST, Afghanistan — An American drone strike on a car carrying a woman who had just given birth in southeastern Afghanistan left five people dead, including the mother, three of her relatives and the driver, Afghan officials and family members said on Sunday.

The strike in the Alisher District of Khost Province occurred either late Friday night or early Saturday, they said. The woman, Malana , 25, had given birth to a son, her second child, at home. But her health had deteriorated soon after and relatives had been taking her to a clinic. On their way home, their vehicle was hit.

After the strike, there was confusion about whether the newborn was among the victims. Later, it became clear that the baby had not been in the car. Turab Khan, a relative, said the boy was safe at home.

The United States military command in Afghanistan confirmed a strike in Khost, saying that three Taliban fighters had been killed. But the military said the strike occurred on Thursday, Nov. 28.