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Firefighters respond to a fire Saturday, Feb. 8, 2025, at a construction site at 1422 E. 1600 South in Provo.

Courtesy Provo Police Department

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The aftermath of a Provo construction site fire is shown Monday, Feb. 10, 2025.

Curtis Booker, Daily Herald

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Firefighters respond to a fire Saturday, Feb. 8, 2025, at a construction site at 1422 E. 1600 South in Provo.

Courtesy International Association of Firefighters Local 593

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Firefighters respond to a fire Saturday, Feb. 8, 2025, at a construction site at 1422 E. 1600 South in Provo.

Courtesy International Association of Firefighters Local 593

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Firefighters respond to a fire Saturday, Feb. 8, 2025, at a construction site at 1422 E. 1600 South in Provo.

Courtesy International Association of Firefighters Local 593

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Federal investigators are upping the stakes as they continue looking into why the construction site of a new Provo apartment complex erupted into flames last month.

The Bureau of Alcohol, Tobacco, Firearms and Explosives, also known as the ATF, in conjunction with the Provo Police Department, is offering a reward of up to $5,000 for information leading to the arrest of those responsible for setting fire to the Remington Commons construction site on Feb. 8, the agency announced in a Monday press release.

At around 3 a.m. that Saturday, firefighters from multiple cities responded to the massive blaze that torched three of four framed four-story apartment buildings near 1600 South and State Street, Provo Fire & Rescue told the Daily Herald.

At one point, while fire crews were tackling the flames, several power transmission lines along State Street fell and also caught on fire, which resulted in hourslong power outages for thousands of residents.

Later that day, an investigation was launched, and an ATF Denver Rocky Mountain Region certified fire investigator was deployed to Provo to assist with the efforts.

The Provo Police Department, Provo Fire & Rescue, the Utah Fire Marshal and the ATF Salt Lake City Field Office are working jointly in the investigation.

Authorities said the damages were estimated at around $4.5 million.

Provo Fire & Rescue said it’ll likely be several months before investigators reach an official determination of what or potentially who caused the fire.

“We’re just sifting through a lot of information to try to narrow down what happened,” Provo Fire Capt. Jeanie Atherton told the Daily Herald on Monday. “It just takes time to get the information that we need to figure out kind of where this is headed.”

According to Provo police spokesperson Janna-Lee Holland, in reviewing camera footage obtained from the construction site, detectives noticed a person was inside one of the structures prior to the fire starting.

“The ignition source is undetermined, and due to the extent of the damage, we may not know exactly how it was started,” Holland said in an email Monday afternoon.

As the investigation persists, authorities are looking for any information that may help lead to a suspect or suspects connected to the construction site going up in flames.

Anyone with information about the fire is asked to contact the ATF at (888) ATF-TIPS (1-888-283-8477) or the Provo Police Department at 801-852-6210.

Information can also be sent via email to ATFTips@atf.gov or through ATF’s website at www.atf.gov/contact/atftips.

Those wishing to remain anonymous can also submit tips by using the Reportit app, available on both Google Play and the Apple App store, or by visiting www.reportit.com.