What do you mean exactly?? Are they just yelling at eachother angrily? If so, That's pretty normal to be every one or few weeks and they usually fix the issue themselves and everything goes back to normal, so you shouldn't worry much. But if they're fighting with Physical Violence, then try to Separate those Who are fighting by calling their attention by yelling loudly OR by getting between them to make space, since they probably don't wanna hit YOU. Hope this helped!