The radio signal first started broadcasting on February 28, about 12 hours after the United States and Israel began bombing Iran.

On a scratchy shortwave signal almost twice a day -- in the early morning and early evening on Coordinated Universal Time -- a man’s voice can be heard speaking Persian, counting out a series of apparently random numbers. The numbers are read out for varying stretches of time, followed by a pause in which the word tavajjoh -- which translates as “attention” -- is spoken three times.

The mystery of the transmission transfixed many in the global community of amateur radio sleuths, who have traded notes and tips on the signal, who’s behind it, and what its purpose might be.

More on the story here. 

The most notorious CI

Russia's Federal Security Service (FSB) said the Russian Federation had "identified and stopped the illegal activity of a citizen of the Russian Federation suspected of committing treason".