According to the Grand Rapids Police Department, a 30-year-old man was found unconscious near the Grand River in the area of the Blue Bridge Monday, Nov. 27.

He has been idenitified as Robert Campbell of Kent City.

The call came in around 8:30 a.m., according to Sgt. Catherine Williams. The man was unconscious laying on the rocks near the river's edge.

He is alive but is at the hospital in critical condition.

Investigators are still investigating why Campbell was at the river and how he became unconscious. There are no signs of trauma, but the department is treating the investigation as suspicious until criminal activity can be ruled out -- per policy.

If you have any information that may assist in this investigation, you can leave a message on Facebook, call the police department at 456-3400 or contact Silent Observer.

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April Stevens is a multi-platform producer at WZZM 13. Have a news tip? Email, visit our Facebook page or Twitter.