A diamond-shaped UFO caught over Veracruz

This dark diamond-shaped UFO is appeared over the city of Veracruz, in Mexico, on September 29, 2016. This mysterious moved slowly in the sky without light and it made no sound. What is it?

The ufologist Scott C. Waring explained:

This diamond UFO was seen today over Mexico and surprised some eyewitnesses as you can see from the video. The UFO is staying low over the treetops to try to keep out of view, but still be able to scan and record its scientific data.