It was bedlam on the streets of Chapel Hill Saturday night, after the Tar Heels snagged a spot in the NCAA men's basketball National Championship game.

10 people, and maybe more, were hurt after the game ... 4 were injured badly enough to require hospitalization.

Chapel Hill cops planned for a big celebration -- shutting down streets in advance -- but it got out of hand as it turned into a wild block party. There were around 40,000 fans who were reveling in the Tar Heels 81-77 win over Duke in the Final Four.