Disturbing messages asking for help have been spotted in Los Angeles and have been visible on Google Maps for years.

Google Maps users recently noticed an assortment of help messages written out on the ground in Los Angeles. The messages sparked fears of human trafficking as some said “LAPD,” “FBI” and Trafico.” A social media user looked into the messages and was told they were being written by a homeless man.

Ominous “HELP” messages carved onto debris in Los Angeles have raised alarm among social media users. Zoomed in Google Maps satellite images of a rail yard off of the San Bernardino Freeway reveal messages that read “HELP” and “TRAFICO,” which means “traffic” in Spanish.