来自友军的误射炮火；误向自己人开火

[ noun ]
fire that injures or kills an ally
<noun.act>

friendly fire \friend"ly fire`\, n. (Mil.)
Weapons fire[9], such as artillery or aerial bombardment,
from one's own forces; -- used mostly when troops do damage
or cause casualties among their own forces; as, the tank was
hit by friendly fire.
[PJC]