Update July 13, 2016: Police now say the body was that of a man and the death is not considered criminal in nature.

Calgary police are investigating what they are calling a suspicious death in Radisson Heights in the city's southeast.

The incident took place on the 3200 block of 12 Avenue.

Little information is available at this time and police have not confirmed whether the body is that of an adult or a child.

David Zimmer, who lives in the area, said he thought a truck was set on fire, which then spread to the garage.

A burned-out white pickup truck was visible in the alley blocked off by police.

"The flames were right over top of the building. It was just going. I don't know how it started. You could see the flames coming over," said Zimmer, who doesn't know the occupants of the house.

"It's actually very scary knowing there was a body in it," he said.