Nine teenage waka paddlers were injured trying to navigate their way through the jostling Rugby World Cup crowd at Auckland's waterfront after becoming separated from the main group.
Six of the girls, all aged between 16 and 18, had to be taken to hospital including one with broken ribs, after their group took a wrong turn and ended up amid the crowd.
Paddler Niki Tauhara, who was with the group, said the girls were assaulted by "aggressive" people in the crowd after security guards told them to go the wrong way.
He said the girls were punched, kicked and had bottles thrown at them.
"They are pretty devastated," Mr Tauhara said, describing what happened to them as a "cowardly act".