Progress M-27M on the way to resupply the ISS is lost. Reasons are not yet clear. This is a major hit for the ISS. It is the second loss of a payload mission in 6 months after the explosion of the Antares rocket carrying the Cygnus spacecraft of Orbital Sciences.

The next supply mission of the SpaceX Dragon spacecraft is now of critical importance to bolster supplies like food and other essentials. A failure of CRS-7 would get the ISS into critical territory.

Fortunately unlike the Orbital Sciences Cygnus failure this will very likely not lead to a lengthy stand down. Russia will probably launch again in 2 months time. Orbital however cancelled any flights of their unreliable launch vehicle Antares and switch to different vehicles with major delays.

Here an article. But it is now outdated. At that time they still had hope they could regain control. No doubt the failure will hit the media soon. Right now it is only in space related forums.

http://spaceflightnow.com/2015/04/28...ommunications/