A suicide bomber has attacked a mini-bus carrying foreigners near the Afghan capital, killing at least nine people.

Police say eight foreign workers and an Afghan were killed in Tuesday's blast near the Kabul airport. A number people were wounded in the attack.

Also Monday, NATO said it has sent a team to investigate a coalition operation that resulted in “several Afghan civilian casualties” in eastern Afghanistan.

Afghan officials said a coalition airstrike on Sunday killed eight women as they gathered firewood in Laghman province.

NATO said it targeted a large group of armed individuals showing hostile intent. It says the air strike killed several insurgents and also resulted in the “unintentional deaths of a number of Afghan civilians.”

NATO says it takes civilian casualties seriously and will conduct a complete assessment of the incident. The coalition offered its “sincerest regret” to the families of those killed.

This week's violence comes just days after insurgents dressed in U.S. Army uniforms attacked a British military base in the southern province of Helmand. The militants, armed with automatic rifles, rocket propelled grenade launchers and suicide vests, killed two U.S. Marines and destroyed jets and refueling stations during Friday's assault.