No, if that was taken from the Bahamas, that's an explosion connected to the loss of the 2nd stage.
Staging happens closer to the Texas coast and I don't believe you'd have line of sight to it from the Bahamas.
I'd say it might be after the loss of the craft. It was losing engines for a while then lost telemetry. This would have been a bit later when it started tumbling in the atmosphere on re-entry. Hopefully we'll know for sure in a few days.