Strange sounds in Mexico City
© YouTube/Roberto Mejia
This time the sounds are different. It was really difficult to capture them since the noise from the highway was too loud, so I captured them in a few videos. It started at around 3:30 am, the videos were captured at around 4:00 am, the sounds stop and return as you can tell in some of the videos.

It's been 3 years since the first ones I heard and it's intriguing as to why they've returned after so much time of going absent. Camera quality is terrible I know, but my other phone died and this one is all I have.