At least two people have died and six others injured as a gunman opened fire on a Halloween party celebration in the US.

Surveillance video and bodycam footage captured the chaos unleashed during a mass shooting in Orlando that left two dead and at least seven hurt, according to the Orlando Police Department.

Two people died and six were injured in a shooting in the downtown area of Orlando, Florida in the midst of Halloween festivities.

After the initial shots were fired, police used security video to put out a description of the suspect, but police then saw the suspect open fire at the second location.