Chicago rapper Mubu Krump apparently has a problem with Lil Durk.

So he crept up on DJ Bandz -- who works Durk's turntables -- and punched him right the middle of a Chicago area mall.

Then, because Krump doesn't think the police check social media, he put the unprovoked assault on Twitter for all to see.

It's goes down @lildurk_ u wasn't in time my nigga ...Share yo location we can meet #PUTTHEGUNSDOWN @djbandz #OTF pic.twitter.com/UYgO9lqrRL

— n DRO we trust (@064drocitykrump) January 5, 2016

Bandz was quick to respond to the provocation:

Lol dez niggas funny... know I'm over good doe we gone keep it n da streets doe we ain't gone take it to cnn pic.twitter.com/wfWzUVCuRi — IG: @DJ_BANDZ (@DJ_BANDZ) January 5, 2016

Then Durk jumped in:

See me and run nigga #pussyboi

— LIL DURK (@lildurk_) January 5, 2016

This got Krump excited:

U bogus for not helping @DJ_BANDZ .... Niggaz ain't yo bro https://t.co/rnBwL8vjvC — n DRO we trust (@064drocitykrump) January 6, 2016

I can wake up and give my kids 30-40k and tell em #liveLIFE

— LIL DURK (@lildurk_) January 6, 2016

That's not true cuz bay bay or rondo would be out .... I know all that rap talk and I want let a nigga trick me https://t.co/3SOX52YZcp — n DRO we trust (@064drocitykrump) January 6, 2016

It so many unwritten rules 2 dis shit ... If u don't know them or don't follow them your not going 2 make it

— n DRO we trust (@064drocitykrump) January 6, 2016

Durk had just done an interview in which he spoke of the positive things going on in his city that get drowned out by the violence.

While nobody was shot in this latest dust up, it's still not a good look for Chicago.