"Stunned eyewitnesses filmed the phenomenon with their smartphones in the small town of Progreso de Madero in the Quecholac municipality of central Mexico's Puebla state.

The footage, which shows a huge black ring hovering in the sky, left local residents baffled.

Some were convinced that it was a flying saucer while others, pointing out that it was partially enveloped in cloud, thought it was a weather-related phenomenon.
Eyewitnesses can be heard in the background of the video trying to explain the apparition.

One woman asks: "What is that?", and a man replies: "A flying saucer?"

Another woman speculates: "It's a rain formation", but the man counters: "No, it's not, it's a black wheel", and the woman notes: "It's going up."

The black ring quickly disappeared from view and there is still no official explanation for it.

Netizen 'Alejandro Lopez Robles' was convinced he had seen something otherworldly, commenting: "It's a flying saucer."