The manager for the event, Anna Demasi, said it was because one of the trucks holding multiple stalls had "blown up".

"The gas lines caught on fire and has blown up," Ms Demasi said.

"We've only got a couple of locals so we can't go on with four stalls."

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Armidale was set to hold the markets on Friday night at the jockey club, featuring food trucks, live music, jumping castles and other entertainment. Gunnedah's event was set to kick off on Saturday night at the showgrounds.

Both the Gunnedah and Armidale markets have been cancelled as a result of the horrific accident.

Ms Demasi said she was very disappointed as a large amount of "effort, money and time had been put in".

"I've been planning this since February," she said.

But Ms Demasi said they do intend to come back, most likely in the new year.