Cops Believe Tekashi 6ix9ine May Spark New East Coast- West Coast War

 As part of his probation for violating the terms of his 2015 plea agreement for use of a child in sexual performance, Tekashi 6ix9ine is forbidden to rep gangs or associate with gang members.

That got off to a bad start when two gang members were arrested for a fight at 6ix9ine's post-conviction party that resulted in one of the arrested men taking two bullets to the stomach. 

Now, police fear the incident may be part of a brewing new East Coast-West Coast war. TMZ reports:

We broke the story ... Tekashi was set to meet with record producer Elliot Grainge for a dinner meeting in NYC, but things got heated after Tekashi's entourage was denied entry ... and shots were eventually fired, leaving one of 6ix9ine's guys with a bullet in his gut.

We're told last week's confrontation was not a one-time freak thing -- it had been brewing for a while, as there have been several disagreements between Tekashi's camp in the East and Elliot's team in the West on how Tekashi's career should be managed.

BTW ... Tekashi is signed to Elliot's label, 10k Projects, which also has Trippie Redd signed as an artist.

Law enforcement sources added that the beef is still way smaller than what blew up between Bad Boy and Death Row in the mid-90s. However, they are monitoring the situation and fear the worst is still to come.