(CNN)After a weekend shootout that left at least nine people dead at a Twin Peaks restaurant in Waco, Texas, authorities are on high alert, worried that the deadly melee might be only the beginning.
Live blog: Waco police await backlash to deadly biker brawl
How ugly might it get? Well, a memo to law enforcement warns that members of the Bandidos and Cossacks have been told by the motorcycle gangs' leaders to take up arms and head to North Texas.
"We would encourage biker groups to stand down," Waco police Sgt. W. Patrick Swanton said Monday night. "There's been enough bloodshed. There's been enough death here."
Will the bikers heed the warning? Here's a look at Tuesday's developments as authorities investigate the Waco shooting: