Police arrested a 26-year-old McCully man Monday in connection with stabbings that left a 5-year-old boy dead and a 29-year-old woman in critical condition.

The incident occurred at about 4:45 p.m. in a second-floor unit of an apartment complex on Lime Street.

Police were initially called to respond to an argument at the residence. A later call reported the incident as a stabbing.

Honolulu Police Department Homicide Lt. Phillip Lavarias said that when officers arrived they found the armed suspect still at the scene. Officers persuaded the man to surrender his weapon and, on a subsequent search of the apartment, found the two injured people.

Lavarias said the child sustained multiple stab wounds to the chest.

An Emergency Medical Services report said that the child suffered a cardiac arrest and was administered advanced cardiac life support before being transferred in critical condition to a hospital, where he died.

The woman suffered multiple stab wounds to the back and was taken in critical condition to a hospital, according to EMS.

Lavarias said the suspect and the female victim might be siblings. The child is believed to be related, as well, but as of Monday evening police had yet to confirm this.

The suspect and both victims resided in the apartment.