Three dates on the Cash Money/Ruff Ryders tour were either postponed or canceled, following a melee last week that left six people injured — five with stab wounds — at a Boston show.

In Philadelphia, a scheduled April 4 show at the First Union Center, to feature DMX, Juvenile and other rappers signed to the popular hip-hop labels, was postponed as promoters continued to investigate the stabbings at the FleetCenter in Boston. No makeup date has been set, according to Ike Richman, a spokesperson for the arena.

Shows scheduled for last Thursday at the USF Sun Dome in Tampa, Fla., and Friday at the American Airlines Arena in Miami were canceled by the venues, receptionists at the arenas said. Official spokespersons for those buildings did not return calls for comment.

In the hours before the Boston incident, Ruff Ryders' co-founder Joaquin Dean boasted that the tour had proceeded since its Feb. 24 opening date in Rochester, N.Y., without a hitch.

"We proved [a nonviolent rap tour] can be done," he said.

Two people were arrested after the fight. David Smith, 34, of Randolph, Mass., was charged with felony assault and battery after allegedly striking another man with a bench, police said. Benny Reyes, 22, of New York was charged with possession of marijuana with intent to distribute.

The stabbing victims were treated at local hospitals.

Ruff Ryders, also home to Eve, the LOX and Drag-On, apologized for the incident, MTV News Online reported. "The incident at the FleetCenter in Boston on April 3 was most unfortunate. Our prayers are with those who were injured and their families," Joaquin, Darren and Chivon Dean, who run the family business together, wrote in a prepared statement, according to MTV News Online.

Al Haymon, who is promoting the third extensive hip-hop arena tour since the beginning of last year, could not be reached for comment.