PORTLAND, Ore. — Oregon beaches have been shut down three times in the past week because of potentially explosive devices.
The so-called “marine markers” are used by military aircraft over the ocean. They contain white phosphorous, which burns when it has contact with air.
There is a possibility that the devices could spontaneously ignite, causing serious injury. Anyone who finds a marine marker device is urged not to not touch it, secure the area 100 feet in each direction, and call state police for removal.
OSP says it is not uncommon to respond to one report of these washed up on shore a month, but three in a week is very unusual.
Additional information about Marine Markers is also available here.