Remarkable ring in the sky of Azerbeidzjan

High above the city of Bakoe on the 6th of may 2010 a remarkable cloud ring was seen.
The ring shaped object became visible in the evening around 8.30pm, it stayed visible for a couple of hours and came to an end at about 2 to 3 hours. At that time the ring totally dissapeared.

In that same direction, near the north border of Azerbeidzjan, on the 8th of may 2010 around 10 pm near the vicinity a similar ring was observed and this one stayed for about 20 minutes in the sky.

Source: Ufologiya.azersayt.com