It's not clear why, but the rappers Ski Mask The Slump God and Rob Stone have some sort of beef. Which is a problem since both are on Desiigner's Outlet tour right now.

On Sunday Ski Mask was removed from the stage during Stone's set in San Diego. Yesterday in LA  he was jumped on stage, allegedly by Stone's crew.

Yo wtf Daygo wasn't fair with you bro! Fuck whatever the issue was @THESLUMPGOD pic.twitter.com/R0mVWe6LHy

— Beto (@heyitsbeto101) April 10, 2017

#LickMob @youngrobstone @macburgz pic.twitter.com/fVJFMh2D8R

— Nathan Villarreal (@NateV__) April 11, 2017

Afterwards, XXXTENTACION — who's Ski Mask's good friend — spoke about the two incidents and issued a bunch of threats.

Yesterday #xxxtentacion had some words for rapper #robstone over his treatment to his bro #skimask on #desiigner tour. (Part 1)

A post shared by DJ Akademiks (@akadmiks) on Apr 11, 2017 at 10:47am PDT

Yesterday #xxxtentacion had some words for rapper #robstone over his treatment to his bro #skimask on #desiigner tour. (Part 2)

A post shared by DJ Akademiks (@akadmiks) on Apr 11, 2017 at 10:49am PDT

That's when Stone replied, as did Ski Mask:

#robstone responded to #xxxtentacion and said "I AINT #drake"

A post shared by DJ Akademiks (@akadmiks) on Apr 11, 2017 at 10:50am PDT

Thirty niggas Againt Four I'm Unbothered And Unscathed

— $ki Mask (@THESLUMPGOD) April 11, 2017

We'll have to see where this beef goes from here.