As federal investigators continue their probe into what caused the deadly Palisades Fire, some residents believe the blaze may have started nearly a week earlier. Investigators with the Bureau of Alcohol,

A CBS News analysis of satellite imagery and photos shared by local residents indicates the Palisades Fire in Los Angeles likely started close to where another blaze, the Lachman Fire, broke out on Jan.

Firefighters are continuing to fight the Palisades fire, which had burned over 23,700 acres and was at just 14 percent contained as of Monday evening, according to Cal Fire. The ATF investigation into the cause of the fire is likely to continue past the point when the fire is finally extinguished.

So far, the probe is focusing on potential human causes, which could include arson, fireworks, unauthorized camping or a rekindling of an earlier fire, law enforcement sources said.

The team investigates fewer than 20 cases a year. Here's a look at how they're handling the probe into the 37-square-mile Palisades Fire.

Fire investigators are looking at a hiking area called Skull Rock as the potential point of origin for the destructive Palisades fire, which erupted on Jan. 7.

The California Department of Forestry and Fire Protection (CalFire) says that more than 12,300 structures have been destroyed—though individual measures for Palisades and Eaton are less than this. Investigators are still working to measure the number of lost and damaged buildings.

Was the Palisades Fire caused by embers left over from another extinguished fire? Was Eaton the fault of power lines? It may take months before investigators know.

The Eaton fire, burning in Altadena, Pasadena and Sierra Madre, was 55% contained as of 6:30 a.m., according to Cal Fire. The Palisades fire, burning in Pacific Palisades, Malibu and Topanga and Mandeville Canyons, inched upward to 22% containment.

Authorities are looking to see if the deadly Palisades Fire and a different fire that took place on New Year's Day were connected as both incidents broke out near the same area.

The Post’s analysis offers evidence that the Palisades Fire started in the area where firefighters had spent hours using helicopters to knock down a blaze six days earlier.

Pacific Palisades residents' long-standing concerns about illegal fireworks may have tragically come to fruition.