An unidentified gunman opened fire at a Walmart store in the US state of Colorado on Thursday, killing three persons including a woman
Hundreds of emergency responders ringed the Thornton Town Centre shopping complex for hours after the shooting was reported around 5 am IST. The Walmart is part of the centre.
Thornton Police said "it was not an active shooter" but advised people to stay away from the area.
A large number of police vehicles were seen in the parking lot of the Walmart. No other details were immediately available.
Local news channels said a few ambulances were rushing to the Walmart, describing the scene as "chaotic".
A press conference by the police department was expected soon when the report last came in.