Two women suffered serious injuries in rollover crashes involving all-terrain vehicles in Kapolei Tuesday afternoon. The incident happened around 2:45 p.m. on Midway Road. The two women were each riding on ATVs when, for unknown reasons, the vehicles crashed and rolled, according to Honolulu Emergency Medical Services (EMS). Both women were taken to the emergency room in serious condition. Neither woman has been identified by name or age at this time. Details of what led to the crash have not yet been determined. This incident remains under investigation.