The U.S.-led coalition in Afghanistan says 32 militants have been killed in recent clashes and airstrikes in the south.

A coalition statement says two of the clashes occurred Thursday in the provinces of Helmand and Uruzgan.

It says in both cases Afghan and U.S.-led coalition troops on patrol were attacked by suspected insurgents and responded with the help of close air support, resulting in the deaths of 27 militants.

The military says no casualties for Afghan or coalition forces were reported in either clash.

The U.S. military in Afghanistan says coalition forces also killed five suspected militants in Kandahar province. A coalition statement says troops were targeting a network of Taliban combatants responsible for attacks in the region.

In another incident in the south, a local official said suspected insurgents attacked a police checkpoint, killing six police officers.

Meanwhile, the provincial council in the eastern province of Khost closed its offices on Friday to protest the killing of at least four Afghan civilians during a U.S.-led military operation on Wednesday.

International humanitarian group CARE said one of the Afghan women killed was a teacher in a school it supported.

The U.S. military said U.S. and Afghan troops were targeting an enemy location when a nearby local family opened fire to, in its words, "defend their home against an unknown threat." Troops returned fire, killing the civilians.

In a statement, U.S. Brigadier General Michael Ryan expressed regret and sympathy and said the surviving family members will be compensated.

Some information for this report was provided by AFP and Reuters.