A military probe concluded that three French soldiers wounded by gunfire were hit by rounds from another French unit, Radio France Internationale reported.
"On the face of things, there was no specific error in the chain of command nor in the procedure," Defense Minister Herve Morin said in a radio interview Wednesday, adding that "a concurrence of different elements led soldiers to believe there were Taliban" in the area.
An inquiry was held after the soldiers were wounded northeast of Kabul last week.
"Sensitive conditions led to a series of misunderstandings between units on the ground," the inquiry found.
Two of the wounded servicemen remain hospitalized, with one of them in serious condition, RFI reported.
Most of France's 3,500 soldiers operate near Kabul. French deaths in the Afghan conflict stand at 47.