Authorities are searching for a yellow diesel fuel can missing from the West Brookfield home where a mother and her three children were found dead, a crime that the district attorney is now classifying as four homicides.

Worcester County District Attorney Joseph Early Jr. identified the victims as the 38-year-old Sara Bermudez and her children, Madison, 8, James, 6 and Michael, 2, during a Saturday press conference. Early previously announced that Madison was 7 years old and that James was 5 years old.

Early asked the public to look out for the plastic yellow diesel fuel can, which investigators believe is missing from the home.

The district attorney would not elaborate on any possible connection the fuel can could have to the incident. A source told MassLive that the bodies were burned.

"I don't want to compromise anything in the investigation," Early said. "If someone comes across a discarded yellow can, it is part of this investigation and we do need your help with regards to that can."

Early also asked anyone in the West Brookfield area with active home or business surveillance cameras or dashboard-mounted cameras to contact authorities.

Anyone who sees such a fuel container or anyone who has surveillance video is asked to call the State Police dispatch center at 508-867-1170. Police also want to hear from anyone who traveled on Old Warren Road on Wednesday or Thursday.

Few details about the crime scene and the manner of the victims' deaths have been released.

The bodies were discovered on Thursday at the family home at 10 Old Warren Road after a well-being check.

Autopsies are being conducted on the four victims. Early said the investigation was still relatively young and very active.

Early said he would not comment on any possible motives in the case.

"We're asking the public to remain vigilant and careful," he said. "This has been declared four homicides. Anything you see out of the ordinary, please call us."

Investigators continued to scour the crime scene on Saturday. Through the morning and into the early afternoon, people driving on West Main Street craned their necks to get a glimpse of the scene. Some drivers pulled in to the parking lot of Northeast Pizza, taking a quick look at the investigation before driving away.

Two of the children were students at the West Brookfield Elementary School. Early would not say the last time the children attended school.

The last few months have been difficult for the town and its school district.

In November, three Quaboag Regional School District teenagers were killed in a crash in West Brookfield.

The community, though rocked by tragedy, will come together to find strength, Superintendent Brett Kustigian wrote in a news release.

"Quaboag has had its share of tragedy as of late, but one thing is for sure, the Quaboag community will overcome all adversity," he wrote. "Our school community will survive and we will be stronger, while never forgetting to remember those who have passed on."

A vigil is planned for Sunday afternoon at the First Congregational Church.