At least six people were killed Monday after a garbage truck ploughed into a group of Christmas shoppers in Scotland's biggest city, according to local reports.

Loud bangs and screams were heard after the green Glasgow city garbage truck crashed into a group of pedestrians waiting to cross a busy street in the city's shopping centre at around 2:30 p.m. local time, Sky News reported.

"[The truck] continued to travel towards George Square, when it crashed at the Millennium Hotel on Queen Street at George Square," Police Scotland said in a statement obtained by Sky News. "There have been a number of fatalities and people injured. Emergency services are currently at the scene."

At least six people were reported dead and another seven people were severely wounded in the crash that police said appears to be a traffic accident and not terror related. Witnesses told Reuters the truck driver was slumped over the wheel and the vehicle seemed out of control before it drove onto the pavement.

"A bin lorry did a run of about 70 to 80 metres on a pavement, mostly on a pavement and knocked down people because it was on a very busy crossing," witness George Ieronymidis, who owns a restaurant near the crash site, told Reuters.

As police investigate the cause of the deadly crash, locals were reeling with the tragedy that came a little more than a year after a helicopter crashed into the roof of a Glasgow pub and killed eight people.

"Just over a year ago, we had another tragedy in Glasgow- it was the helicopter crash. And now this has happened again just before Christmas," shopper Lauren Gilmore told Sky News.