Police are calling for witnesses to an incident in Castlecliff that left two men with stab wounds.
Detective Aaron Bunker of Whanganui Police said the men were assaulted at Lundon Park around 3am on Sunday.
"After a party at a local address, some partygoers have gone to Lundon Park. While at the park a fight has broken out, resulting in two people being stabbed."
Mr Bunker said both men required medical attention but were later discharged from Whanganui Hospital.
He said police wanted to hear from people at the party and any members of the public who witnessed the incident.