Black UFO flying over an angel statue in Mexico City

On January 1st, 2019, a black UFO was photographed over an Angel statue, in Mexico City. What is it?

Witness report:

Took pics of angel statue in Mexico City. after getting home I noticed the UFO in that pic. Blew my mind I couldn't believe it but here it is. Enjoy.

The world needs to see this....

Source, 16th January 2019