Honolulu police arrested a 42-year-old man on suspicion of attempted murder after a 21-year-old woman and another man, 39, were stabbed early this morning in Waikiki.

The suspect and the woman had an argument at about 4 a.m. that “escalated to a physical altercation between the female victim and the male victim,” according to a Honolulu Police Department summary of the incident.

During the fight, the suspect “injured both victims with a dangerous instrument,” police said. “The male victim suffered life threatening injuries, and the female victim suffered substantial injuries.”

Honolulu Emergency Medical Services said paramedics responded at about 4:10 a.m., to Kalakaua Avenue and Keoniana Street and treated a male with stab wounds to his upper chest, a woman who was stabbed in the back, and another man with injuries to his hands.

“Paramedics performed life-saving treatment” to the man with stab wounds to his chest and took him in critical condition to a hospital, according to an EMS summary of the incident. The other man and the woman were transported in serious condition.

Officers arrested the suspect for suspicion of second-degree attempted murder and he remained in custody today.