Witnesses have spoken of their horror at seeing children 'shot in the head' during the 4th of July parade massacre shooting - with the gunman still at large.
As families and children sat waiting for the annual procession in Highland Park, Illinois, US, at 10am local time, hundreds of families were forced to flee for their safety after a gunman opened fire from a roof.
Witnesses have recalled the moment a shooter opened fire from the roof of an outdoor fitting store - and shot people in the crowd including children.
