Ottawa police are appealing to the public for help in solving a case that's left a 51-year-old man in critical condition with massive head injuries.

Police say the man was found lying in a parking lot beside his bike in Ottawa's west end near a business at the corner of Merivale Road and Shillington Avenue on Aug. 26.

Although police originally pegged the case an accident, they are now looking into whether or not the man may have been assaulted.

Anyone with information about the case is asked to contact Ottawa police at 613-236-1222 ext. 2266 or Crime Stoppers at 613-233-TIPS.