This actually started over 2 months ago, and has been pretty common since:

(Apr 26) http://www.latimes.com/world/mexico-americas/la-fg-venezuela...

(May 11) https://panampost.com/sabrina-martin/2016/05/11/venezuela-lo...

Now it is about essentially anything. Specific product shortages started long, long ago:

(Nov 2015) http://www.businessinsider.com.au/why-venezuela-is-running-o...

And for electronics it has been years. The cause is widely reported to be price regulation.