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Three Americans killed in 'green-on-blue' attack

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According to the ISAF, an individual wearing an Afghanistan National Army uniform "turned his weapon against the ISAF service members in eastern Afghanistan."

An investigation is underway, according to NATO.

Meanwhile, in western Afghanistan, an Italian soldier was killed and three others were wounded when someone threw explosives into an armored vehicle, according to The Guardian. The attack came while the soldiers were coming back to base after training Afghanistan security forces.

Earlier in the week the House Armed Services Committee approved a draft of a budget bill that requires President Obama and Defense Secretary Chuck HagelCharles (Chuck) Timothy HagelOvernight Defense: Navy medic killed after wounding 2 sailors in Maryland shooting | Dems push Biden for limits on military gear transferred to police | First day of talks on Iran deal 'constructive' 140 national security leaders call for 9/11-style panel to review Jan. 6 attack Trump Afghan pullout deal unachievable, says ex-Pentagon leader MORE to report the Obama administration's plans for postwar Afghanistan. Those details include missions and troop numbers after the United States withdraws from the country.