KABUL, Afghanistan - NATO said yesterday it was investigating the deaths of five civilians who were killed when coalition forces returned fire against insurgents shooting from a compound in the Sangin district of Helmand.

NATO also said two of its service members were killed following roadside bombings in southern Afghanistan. The military coalition said the attacks occurred Tuesday. It provided no further details.

The dead civilians were found after the exchange of fire, a NATO announcement said. It did not say when the battle took place. NATO said the insurgents were using a civilian home to attack coalition forces.

According to NATO, the insurgents attacked its troops with assault rifles and a machine gun from the compound, and the soldiers returned fire and used mortars.