Update 5:03 p.m. Saturday, Dec. 26, 2020 - NASHVILLE, Tenn. (AP) - Federal agents have converged at the home of a possible person of interest in the explosion that rocked downtown Nashville on Christmas morning.

Investigators are scouring hundreds of tips and leads in the blast that damaged dozens of buildings.

More than 24 hours after the explosion, a motive remained elusive as investigators worked round-the-clock to resolve unanswered questions about the mysterious blast.

The explosion took place on a mostly deserted street on a sleepy holiday morning and was prefaced by a recorded warning advising those nearby to evacuate.

Officials have been searching a home in Antioch in suburban Nashville.

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Update 1:07 p.m. Saturday, Dec. 26, 2020 -  NASHVILLE, Tenn. (AP) - Two law enforcement officials have told The Associated Press that federal investigators have identified a person of interest in connection with the explosion that rocked downtown Nashville on Christmas Day and are searching a home associated with that person.

(Copyright 2020 The Associated Press)

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Update 2:52 p.m. Friday, Dec. 25, 2020 - Two law enforcement officials tell The Associated Press that authorities have found human remains in the vicinity of the explosion that rocked downtown Nashville early Christmas morning.

It is unclear how the remains are related to the explosion or whether they might belong to the person believed to be responsible or a victim.

The officials could not discuss an ongoing investigation publicly and spoke to the AP on condition of anonymity.

A recreational vehicle parked on a street exploded Friday. Authorities have said they believe the blast was intentional.

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NASHVILLE, Tenn. (AP) - A recreational vehicle parked in the deserted streets of downtown Nashville exploded early Christmas morning, causing widespread communications outages that took down police emergency systems and grounded flights at the city’s airport.

Authorities said they believe the blast was intentional.

Three people were hurt in the explosion, which shattered windows and damaged buildings.

Metro Nashville Police Chief John Drake said police were responding to a report of shots fired when they encountered a recreational vehicle blaring a recording that said a bomb would detonate in 15 minutes.

Police evacuated nearby buildings and called in the bomb squad.

(Copyright 2020 The Associated Press)