Five people were stabbed when a wild melee erupted at an after-hours party in Washington Heights, authorities said.

The victims were hanging out in front of a building on Amsterdam Avenue near West 171st Street when they were attacked just before 6 a.m. Wednesday.

Four men and one woman were stabbed during the brawl.

Two of the men, 31 and 24, were taken to Harlem Hospital with stab wounds to the stomach. An 18-year-old man who was stabbed in the chest went to Columbia Presbyterian. A 44-year-old woman was stabbed in the abdomen and a 30-year-old man was stabbed in the neck. Both were treated at St. Luke’s Hospital.

No arrests have been made and the investigation is ongoing.