A video uploaded to YouTube by the channel SuspectSky appears to show a UFO in the skies above California.
The footage was captured in Rowland Heights, just east of Los Angeles, California, and shows a small white craft being followed by a larger craft.
The two objects, in the clip titled ‘Large Black UFO with Another Leading Object Seen in California’, appear to be moving over a mountain range and were spotted on October 24.
The man behind the camera, who took the footage when he was driving, says in the video: “If it is an airplane, it is moving very quickly.
“I was driving when I saw it and I had to make a U-turn to come back to see this
“At first it looked like a cigar shape, right now it looks like it is almost a saucer.”
Some of the commenters beneath the clip, which has racked up more than 15,000 in less than 24 hours, were convinced that it is a UFO of extraterrestrial origin.
One person wrote: “The smaller object in front of the black one,now that’s not right! It looks like a ufo to me!”
Another added: “Too fat to be a plane. The white object might have been a regular passenger plane. The black one might have been a UFO.”
However, others offered more plausible explanations.
One said: “This is simply a plane pulling an advertisement behind it. Nothing suspicious or suspect about it.”
Many believed it could have been military crafts, with one person stating: “It actually looks like one of those military helicopters with double blades – Chinook.”
Just last month it was reported a police helicopter was investigating a bizarre-looking circular “UFO” in almost the same spot.
The video, filmed over Los Angeles shows what has been described as an LA County Sheriffs helicopter checking out a hovering spherical object.
However, hopes that evidence of aliens may have been discovered above California, were soon dashed however, by sceptical debunkers.
The LASD aero bureau later confirmed what it was investigating.
The spherical object turned out to be an advertising helium balloon for vape company Brass Knuckles.