Chief Keef took to Twitter today (December 3) to react to the shooting death of a young man at the hands of San Francisco law enforcement yesterday (December 2).

CBS Bay Area reports that a man in his 20s was shot and killed on the sidewalk after police asked him to drop a weapon.

The San Francisco Examiner says the weapon was a knife. The man, who has yet to be identified, was a suspect in a stabbing that occurred earlier that day.

“We need to kill all Law Enforcement!” Chief Keef wrote on the social media site. “Y’all down? Fuck it! Time to make the world end.”

This post has since been deleted, but was captured as a screenshot in a YouTube video.

The rest of his comments are still on the site.

“Why did they shoot that little boy down like that?” he says. “On the side walk! I couldn’t even watch it.”

The Chicago rapper then makes a personal plea to President Barack Obama to take action against police brutality.

“Aye @BarackObama Man What U Gonna Do About This Man?” he says. “For real I don’t like it I didn’t say anything about anything else but this isn’t right.”

For additional Chief Keef coverage, watch the following DX Daily: