UFO (Representational Image)
UFO (Representational Image)Reuters

Sighting of Unidentified Flying Objects (UFO) in different parts of the world have always made headlines. While some believe it to be from a different world, others completely disagree. 

In one of such UFO sightings, residents of Denver spotted three glowing objects in the night sky of 4 July. Eye witnesses claim that they observed the strange orbs over the sky while watching fireworks.

The strange sighting was captured in two different video clips that was posted on You Tube and experts believe that the movement of the orbs in the second video appeared to be controlled by an alien.

 Check out the first clip of UFO over Denver

"Watch as these glowing orbs are seen following each other above Denver. In the second video you see the orbs defend from the sky and move over the city. The movement in the second video shows it is controlled by intelligent beings." said Scott Waring from UFO Sightings Daily.

"Denver Strange Lights (UFO's?) On July 4, 2014 at 9:34PM, we were watching fireworks in Denver. Suddenly we see strange orbs of light flying around" said an eye witness.

Check out the second clip of UFO over Denver

Several similar sightings have been reported in the past as well.

In another unbelievable sighting, a person reportedly claimed to have sighted a UFO with an alien controlling it. The UFO was found on Google Earth in the Trout Creek, Montana area and it is believed that the same UFO has been sighted over 20 times on Google Earth, according to Waring.

However, some people have believed the sighting to be true, while some disagree stating that certain digital lens artifacts can make strange images.

Again a California resident spotted three orbs hovering over the city on 29 June. The sighting appeared over Sherman Oaks, US and was witnessed by a person, who posted a video of the strange sighting on YouTube.

According to the witness and YouTube user YodaVon.VaderWalker, the orbs appeared to rise up and float in the air, which balloons don't seem to do. The orbs later faded away. The sighting was first reported by UFO Sightings Daily.

On 20 June, a round object was spotted in white clouds over Calgary, Canada. The weird sighting was witnessed by a YouTube user unicusCDN, who posted it on the video-sharing website.

Recently on 4 July, an object was spotted hovering over a tall building in the city of New York, the day America was celebrating its Independence Day. The object was witnessed by a UFO researcher who captured the strange object in a 30 second video.