* Astronomy

A loud explosion was heard yesterday morning in the area of the Comanesti city, in Bacau County, Romania, but authorities were unable to explain what caused the sound that was heard from tens of kilometres around the town.
Comanesti Mayor Viorel Miron said he believed the blow was a result of the activity of the nearby mining exploitation, but the checks revealed that the mining companies had not caused the explosion.

"Such situations occurred when a strong plane exceeded a certain height and is called a sonic boom" - Gelu Margina, head of the police in the nearby town of Moinesti.

However, air traffic controllers in the county did not announce any incident.

"In our base there were no flights starting with Wednesday and there are no flights on the civil airport, either" - Gelu Miron, public relations officer from the 95 Air Base in Bacau.

An army helicopter searched the area but found nothing to prove there has been an explosion.
Viorel Miron said that locals recounted that a weird noise was heard before the explosion, like a large object falling from the sky.

"Some even talked about a meteorite having caused the blow" - Viorel Miron .

Adapted from source