Police are investigating after two people suffered serious injuries in a motorcycle crash at Lawrence Road and Ramer Road in unincorporated Harvard | Photo: LMCScanner / Google Maps.

A man is in critical condition and another man suffered serious injuries after a motorcycle crash near Harvard Sunday evening in which police say alcohol was a factor and the men did not wear helmets.

The McHenry County Sheriff’s Office and the Harvard Fire Protection District responded at 8:45 p.m. Sunday to Lawrence Road and Ramer Road in unincorporated Harvard for a single-vehicle crash.

A 2014 Yamaha FZ-09 motorcycle was traveling southbound on Lawrence Road approaching Ramer Road when it failed to navigate a curve in the roadway and instead struck a guardrail, according to the McHenry County Sheriff’s Office.

A Flight For Life and a Mercyhealth REACT medical helicopter were called to the scene.

The two riders, a 30-year-old Harvard man and a 26-year-old Wonder Lake man, were both flown by helicopter to Javon Bea Hospital on Riverside Road in Rockford.

[Suggested Article]  2 suspects armed with guns arrested after shot fired during home invasion in Gurnee prompts school lockdowns

The Harvard man remains in critical condition and Wonder Lake man remains in serious condition.

Neither rider was wearing a helmet at the time of the accident and alcohol is considered a factor in the crash. Police do not know yet which of the men was driving the motorcycle.

The crash remains under investigation by the McHenry County Sheriff’s Office Major Crash Investigation Unit. Anyone with information is asked to contact the Major Crash Investigation Unit at 815-338-2144.