Audio warning was being broadcast before explosion rocked downtown Nashville. Video shows moment of blast.
30-second clip
https://twitter.com/Breaking911/status/1342521448414539782
https://www.fbi.gov/services/laboratory/tedac
https://twitter.com/CBS_Herridge/status/1342526233247150086
@JuddPDeere45
President @realDonaldTrump has been briefedon the explosion in Nashville, Tennessee, and will continue to receive regular updates. The President is grateful for the incredible first responders and praying for those who were injured.
https://twitter.com/JuddPDeere45/status/1342505032575557632