Talk:Tenno Specter/@comment-67.204.32.58-20140428194559/@comment-10763492-20140428230750

That's most likely, because they were hit by the lasers. The lasers can inflict radiation status effect, which confuses the AI and making them attack their allies.

Side note: If you get affected by the status effect from the lasers, you'll be able to kill your squad members as well.