The National Weather Service said radar picked up a debris field Monday afternoon in a Louisiana city — around the same time residents around the region reported hearing a loud "boom."
On Monday, a loud noise was heard just after 4 p.m. by Shreveport residents who described it as sounding like a sonic boom, KSLA-TV reported. According to the local Fox affiliate, callers described their walls and windows rattling.
However, the U.S. Geological Survey said there was no seismic activity in the area. Further, KSLA reported there was no evidence of any explosions or plane crashes in the immediate region.
Now, there may be a new clue.
KSLA's senior forecaster Mary Mayeaux explained images captured on radar appeared consistent with a debris field and originated in the area where the noise was reported. There was no rain in the area at the time and whatever was caught on radar rose to about 1,000 to 1,500 feet in the air.
For radar to have picked up on the object, it would have had to be dense in particles, such as smoke or ash, KSLA reported.
Yet, as Mayeaux noted, "whatever happened that radar detected, it didn't elicit a response (from people nearby)."
So what was the loud boom? For now, it remains a mystery.
Follow Oliver Darcy (@oliverdarcy) on Twitter