american soldier was killed in a shooting incident wednesday in the eastern afghan city of jalalabad in which at least two other u.s. troops were wounded when an afghan soldier opened fire at them , a u.s. official said .
the incident happened after a meeting between afghan provincial leaders and a u.s. embassy official in the compound of the provincial governor in jalalabad .
all u.s. embassy staff were accounted for and returned safely to their mission , the embassy said .
it was the second fatality suffered by nato since the beginning of the year .