Strange cloud in Romania, in two separate locations, similar with the cloud from Moscow

Here is the translation with Google translate:
Last week a strange phenomenon was photographed by several readers of REALITATEA.NET. over the Constanta County. Similar Images were photographed at Dambovita County. Readers have caught the image REALITATEA.NET a cloud surrounded by a ring, which seems to break away from heaven.
The phenomenon occurred this time in the village Dragomireşti. The images were published by a local newspaper. Julian from Agnita shot the strange phenomenon in the right way to Medgidia Fetesti town, the Sun Highway. The clouds seemed to have gathered all in one place, and Eugene in Bucharest this phenomenon photographed Sunday morning.

A similar phenomenon was shot at Moscow, and pictures have appeared on YouTube. Romanian experts say it is a party cloudy, rare. Such clouds are formed - usually - before the summer storms and are a sign of large amounts of water vapor which collects in the atmosphere.