Two teenagers were injured Saturday after they were attacked and robbed by a group of males at a Pearl City park, police said.

The victims, ages 17 and 18, were approached by the assailants about 6:40 p.m. and assaulted. Police said the 18-year-old was stabbed with a knife and the younger teen was attacked while his property was taken.

Honolulu Emergency Medical Services said both teens were treated at Pacheco Neighborhood Park and taken to a hospital. The older teen was in serious condition, and the other teen in stable condition.

Police opened cases for second-degree attempted murder and second-degree robbery.

No arrests were made in the case.