'Five groups are interested in buying the NHL's Sabres and keeping them in Buffalo, commissioner Gary Bettman said Thursday, a day after the team's outgoing owner was arrested on fraud charges. Bettman, who did not identify the potential ownership groups, said it was "purely a coincidence" that he was in Buffalo 24 hours after John Rigas and two sons were arrested in connection with the financial meltdown of Adelphia Communications.'