Mexico’s highly-active Popocatepetl volcano began its latest eruption on Monday evening, but mysterious, fast-moving lights in the vicinity immediately after the explosion prompted major concerns online.

Government-run webcams monitor Popocatepetl and eagle-eyed netizens spotted what appeared to be a UFO in the skies above shortly after it began spewing ash following a massive volcanic explosion late Monday evening.

Por si no lo vieron.

⚠️ Impresionante ⚠️
Actividad del #Volcán #Popocatépetl ayer a las 23:18 hrs.

Vista desde San Nicolás de los Ranchos, #Puebla.
Vía: @jabed1.

🚦El Semáforo de Alerta Volcánica se encuentra en #AmarilloFase2. pic.twitter.com/5SQAfl0sG7

— Webcams de México (@webcamsdemexico) January 28, 2020

Naturally, online speculation about alien visitors was rife, with some making light of such an unlikely scenario and others simply wanting to believe that the truth is out there.

Yo y una amiga tomamos fotos en diferentes momentos del Pico de Orizaba y salen #Ovnis pic.twitter.com/hSrvRHu12l

— Rob Patraca (@PatracaRob) January 28, 2020

pic.twitter.com/rrGj8vqHCa

— j.a.Badía (@ElBadiablo) January 28, 2020

pic.twitter.com/ebNc6eK2Jx

— P3LO2 (@P3LO2) January 29, 2020

“Visiting your planet and you don’t even look up,” a caption read above a cartoon one Twitter user shared of an alien being ignored by people on their smartphones.

Paseando por tu mundo… Y tu ni me miras… 👽 pic.twitter.com/OK0j19Vlnf

— RUBEN MENDOZA (@Danger36992348) January 29, 2020

pic.twitter.com/ZcMqnE17Vh

— maidalore2 (@maidalore2) January 28, 2020

But many were quick to burst the UFO bubble. “It’s just a plane” or “it’s a satellite” were the most common responses by the realists among the commenters.

Regardless of potential extraterrestrial activity or not, authorities have warned the public to avoid the area while the Level 2 Yellow alert is in place. 

The initial eruption began at approximately 23:18 local time on Monday night, with the volcano launching cinders high into the sky before belching out a vast column of ash some 600 meters into the sky. A second eruption took place just 40 minutes later, launching volcanic debris into the surrounding area.

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This content was originally published here.