The letter, provided to BuzzFeed News from an anonymous source, warned of heightening tensions between police and residents on a day when many locals have taken to the streets to celebrate.

Sgt. Lennardo Bailey told the “Eastern Command Staff” [sic’d]:

“I have been to five calls today and three of those five calls for service; I have been challenged to a fight. Some of them I blew off but one of them almost got ugly. I don’t want anybody to say that I did not tell them what is going on. This is no intel this is really what’s going on the street. This is my formal notification. It is about to get ugly.”