A series of collisions involving multiple vehicles near the H-1/H-2 merge, eastbound direction, on Friday night resulted in two overturned vehicles, at least four injured persons and significant traffic congestion in the Wai­kele area.

Honolulu Fire Department personnel were called to extricate a person trapped in one of the overturned vehicles.

A 48-year-old man was taken in serious condition to a hospital, while three others were transported in stable condition.

It was not determined how many vehicles were involved in the 8:30 p.m. incident.