They were under orders to kill (murder) the entire cult, and indeed five had already been murdered by the helicopters before the land army ever arrived.
No warrant was ever brought or presented. The only warrant even sworn out, was against Koresh only, and claiming he was harboring illegal aliens who had overstayed their visa, or allowing such aliens to handle firearms. LOL. In WACO! For this, they shot the place to hell and killed them all.