A massive explosion ripped through downtown Nashville on Christmas morning. It severely damaged much of the area’s 2nd Avenue including at least 41 buildings.

The explosives were placed in an RV that arrived in the downtown area at approximately 1:22 a.m. Surveillance photos captured the RV that police believe was linked to the blast. The authorities have asked anyone with information about the RV or the bombing to call Crime Stoppers at 615-742-7463 or report it online via http://fbi.gov/nashville.

Surveillance camera photo of RV suspected to be the source of the bomb in Nashville.

The RV from the surveillance photos appears to be similar to a late ’90s Four Winds 31-ft RV on a Ford chassis. 

Several hours later, people who lived in the area reported hearing automatic gunfire. Five minutes later, the gunfire was repeated, and a few minutes later the gunfire was heard a third time. Several citizens called 911 and reported it to Nashville police. 

Police reports say that they were called to the area at 5:30 a.m. in response to the gunfire. When they arrived at the scene the officers found the RV parked in front of an AT&T transmission building at 166 2nd Avenue North.

The RV was repeatedly broadcasting a message warning of an explosion set to occur in 15 minutes, police said.

“Evacuate now,” a computerized, female voice coming from the vehicle said. The voice was heard in several surveillance videos that were posted on Twitter.

“This vehicle will explode in 15 minutes,” the voice said. After repeating that message for a minute, the voice continued the countdown.