Recently, radio bursts from space were observed with a strange mathematical pattern.

http://www.foxnews.com/science/2015/04/06/radio-bursts-from-space-reveal-strange-mathematical-pattern/

The following article claims the chances of the signals having a natural cause are only 1 in 5000.

http://www.examiner.com/article/alien-life-signals-radio-bursts-strange-mathematical-pattern-heard-space 

That doesn't necessarily mean they're extraterrestrial, as the possibility has not yet been ruled out that we're dealing with interference, e.g., from a communication satellite. 

The topic is being discussed at The OutPost Forum: http://www.theoutpostforum.com/tof/showthread.php?1974-Signals-from-Space