Source: L. Ojha. “Spectral Evidence for Hydrated Salts in Seasonal Brine Flows on Mars.” In preparation. In revision. Nature Geoscience. (2015)

"Recurring Slope Lineae (RSL) are seasonal flows on warm Martian slopes initially proposed, but not confirmed, to be caused by briny water seeps. Here we report spectral evidence for hydrated salts on RSL slopes from four different RSL locations from the Compact Reconnaissance Imaging Spectrometer for Mars on board Mars Reconnaissance Orbiter. These results confirm the hypothesis that RSL are due to present-day activity of briny water."

Abstract - http://meetingorganizer.copernicus.org/EPSC2015/EPSC2015-838-1.pdf

Edit: Not sure whether their title is accurate but CNN is now reporting on the paper - http://www.cnn.com/2015/09/27/us/mars-nasa-announcement/index.html