Social media users have noted satellite imagery showing the words "HELP" and "TRAFICO" etched into the ground at a rail yard in Los Angeles.

Mysterious ‘HELP’ messages in a Los Angeles yard spotted on Google maps - The property in question belongs to Union Pacific Railroad, according to Los Angeles police ...

Mysterious messages spelling "HELP" and "TRAFICO" have been discovered near the Union Pacific railroad yard at the intersection ... The large-scale signs, visible from Google Maps, have sparked ...