Some residents were left terrified after they saw the alleged portal open up above them.
In a video uploaded to YouTube by serial conspiracy theorists SecureTeam10, a bright light is seen being shone straight down from the sky.
The narrator, who states he was sent the video on Twitter by a man simply known as Michael, says the people who captured the footage were on their way to Huntington Beach, California, at 5.30 AM when they spotted the light.
The speaker over the video adds that Micael said the footage “looked literally like a portal, opening up in the sky where we had this strange light which appeared and was shining directly down towards the Earth”.