Boston Police Commissioner Ed Davis says up to 30 people have been arrested during the Celtics championship celebration.
A department spokeswoman says most arrests were for disorderly conduct.
Several storefront windows were damaged near the TD Banknorth Garden after the Celtics' 131-92 win over the Los Angeles Lakers in Game 6 of the NBA Finals.
Police spokeswoman Elaine Driscoll says more information will be released later Wednesday.
Police increased patrols around the arena Tuesday night and early Wednesday and used video surveillance at key areas around the city to control rowdiness.
Previous New England Patriots and Boston Red Sox championship celebrations have been marred by deaths among revelers.
This program aired on June 18, 2008. The audio for this program is not available.