Guam - Guam Police criminal investigators are still trying to piece together how one man sustained a gunshot wound over the weekend. Authorities are now saying they have no idea how the man was shot or even where the shooting went down.

A 30-year-old man is fighting for his life in the Intensive Care Unit at the Guam Memorial Hospital after he was shot Saturday evening. GPD spokesperson Sergeant Mike Aguon said, "We had an individual dropped off at the GMH emergency room by a private citizen. It's unknown as to where the individual was shot or how he was shot, All we know is that we do have a victim at GMH who is listed in critical condition."

Aguon could not say if the man suffered from multiple gunshot wounds. He says CID is still looking for the individual that dropped the victim off to the hospital. "Anytime anybody is involved in a shooting there is always going to be a concern and will question them, and I know that there's been no arrests made in this case and that its still open so everybody is still pending," he said.

Aguon adds investigators are also looking for clues that could lead to the scene of the crime. CID agents cordoned off the parking lot at the Mobil-McDonalds in Maite Sunday - the following morning. Aguon says it became an area of concern. "The way an area of concern is someone might have mentioned it during the investigation so the officers went over there just to check. If it's an area of concern what we want to do is isolate it and make sure if is the scene that we protect it from being contaminated from outside environment," he said.

Police questioned several individuals, but would not confirm if they have any suspects in custody at this time. "Everything is still pending and the case is still open at this time," he said.

The victim is listed as a John Doe in the hospital, however according to the nursing supervisor, family members have identified him. Police are also investigating several areas of interests, as the Mobil in Maite is just one area they learned of. Anyone with information is urged to contact police or Guam Crimestoppers at 477-HELP (4357).