NEW: This is an emergency message from the Los Angeles County Fire Department.

The message met a population already on edge.

But for many, the false evacuation alerts continued, buzzing their phones overnight and into the next day.

This illustration photo taken shows the recall message of an evacuation warning issued by the LA County Office of Emergency Management. Emergency managers in Los Angeles apologized on January 10 after false evacuation alerts sparked panic in a city on edge over an unprecedented wildfire disaster. Millions of mobile phones blared on the afternoon of January 9and again on January 10 morning with automated warnings urging people to be ready to flee.

This photo illustration shows the recall message of an evacuation warning issued by the LA County Office of Emergency Management.CHRIS DELMAS/AFP/Getty Images

There is no one sitting at a desk right now initiating emergency alerts, he said.

Determining where an issue lies within the alerting process can be complicated, because the system itself is layered.

The FCC did not respond toRolling Stonesrequest for comment on the investigation.

The last issue the accidental county-wide send was the one Stanford says is the most complicated to pin down.

The county said its software provider, Genasys, has been conducting tests to see how this happened.

These are very different issues we need to better understand, he says.