Police and St John's ambulance responded to reports of a large mob fight between a group of 15 to 20 Mongrel Mob gang members in Maraenui, Napier.
Initial reports suggested the brawl occurred between rival gangs but police later said it was members of just one gang fighting themselves.
Hawke's Bay Today understands Mongrel Mob members were involved in the brawl which occurred in Percy Spiller Avenue, just off Masefield Ave on Sunday.
One man involved in the gang brawl is thought to be transported to the HB hospital.
Police were notified about the incident at 12.03pm.
One man received moderate injuries as a result of the brawl and was transported to the Hawke's Bay Hospital.
It is understood baseball bats have were used in the brawl.