This also happened to me just now, attached an image of the area.

Me and a friend run our own PVE-server since a couple of days back.
Since there is no else playing on this server I would like to comment on the speculation that "other players" have looted the good spots already.

This is my report so far (with persistent turned ON).

Food can be found, but it is extremely rare. I actually like this.

The server loot has been reset multiple times, sometimes one or two items spawn in locations specified below as containing no loot at all, but it is usually books or hats that spawns.

We have seen no loot whatsoever in

• Military barracks
• Garages (with the red double doors)
• Yellow houses
• Prison garages (Prison Island)
• Firestations
• Schools
• Medicial buildings (hospitals and the smaller one)

We have seen alot of loot (like to much) in:
Cars
Toilets
Military crashes
Small buildings in connection to big industrial buildings
Police stations (saw 11 handcufs in the same station, and like 6 police hats...)