A primary school In Las Vegas, Nevada, was on lockdown due to a 'man on a balcony with a rifle' nearby, US reports say.
Breaking911 reports that witnesses say the man is yelling as he holds a rifle.
KTNV Action News says a daycare centre has been told to keep children inside.
Las Vegas was the scene of a major shooting last October when a gunman opened fire on a crowd of concertgoers at the Route 91 Harvest music festival on the Las Vegas Strip, leaving 58 people dead and 851 injured.
UPDATE: