Seton Hall -- There's No Race War on Our Basketball Team

Seton Hall University tells TMZ Sports there is NO investigation into an alleged racial divide on the men's basketball team ... claiming reports of racial harassment between players are BS.

FYI -- the Seton Hall team (which was ranked #19 in the country earlier this season) has had a disastrous couple of weeks ... punctuated with the sudden departure of starting sophomore guard Jaren Sina last week.

There were reports that Sina (who is white) made his decision to leave the team, in part, due to teammates verbally attacking him over the color of his skin.

But SHU Assistant Athletic Director Matt Sweeney tells us school officials are convinced the reports are false -- and are NOT conducting an investigation into the allegations.

"They're a tight team working through a difficult time right now," Sweeney says.