Afghan and international forces are frequently targeted in gun and bomb attacks, but civilians are often the victims.
The latest attack came a day after four fighters were killed in a shootout by Afghan and international troops in northeastern Kapisa province, according to a coalition statement.
The clashes broke out as Afghan and coalition forces targeted the Hizb-e-Islami Gulbuddin network.
"The force detained three suspected militants," the statement read.
Forces loyal to the Taliban, which was in power in Afghanistan between 1996 and 2001, have been resurgent in recent months, particularly in the south of the country.
Nearly 70,000 soldiers from the US and the Nato military alliance are the country fighting alongside government forces against the Taliban.