Virginia shooting: Viewers and colleagues react

Two US television journalists have been shot dead during a live broadcast in the state of Virginia.

WDBJ7 TV reporter Alison Parker, 24, and cameraman Adam Ward, 27, were killed during an interview in Moneta, Bedford County.

The footage captures what appears to be the gunman, who is apparently holding a handgun.

Some viewers analysed video of the murders to try to identify the killer.

Video journalist: Andrew Webb