The injured have been identified as UNP provincial councilor Tissa Bandara Herath and a security guard of Sri Lanka Cricket.
As the fans were leaving the stadium after the match that Sri Lanka lost, someone had hit the security guard directing the traffic with a glass bottle and fled.
Police went after a youth thought to be the attacker, caught him and started beating him, when councilor Herath intervened.
Herath claims anti-riot squad members charged him with batons and belts.
The first suspect denied having carried out the bottle attack, after which a second youth was arrested.
Dambulla police are investigating the matter.