JABAR, Afghanistan - A coalition airstrike destroyed a mud-brick home after a rocket attack on a U.S. base, killing nine people from four generations of an Afghan family including a 6-month-old, officials and relatives said Monday - one of the latest in a string of civilian deaths that threaten to undermine the government.

It was the third report in two days of U.S. forces killing civilians. The airstrike took place late Sunday in Kapisa province north of the capital, some 12 hours after U.S. Marines opened fire on civilian cars and pedestrians following a suicide bombing in eastern Nangahar province.

In the other incident, an American convoy in the southern city of Kandahar - where suicide attacks have become commonplace over the past year - opened fire Monday on a vehicle that drove too close, killing the driver, said Noor Ahmad, a Kandahar police officer who said he witnessed the shooting. A NATO spokesman said he did not have any information.

Up to 10 Afghans died in the aftermath of the Nangahar suicide attack, which wounded a U.S. Marine. President Hamid Karzai condemned the bombing,