A teenage Walmart employee who was found dead at her store's walk-in oven last week was said to have been “trapped” inside while the power was still on, according to audio recordings from emergency responders who responded to the tragedy.

The call, which lasts about 90 seconds, was published by The Daily Mailshows a dispatcher describing the incident as a “technical rescue call” at the Walmart in Halifax, Canada.

“The woman is locked in an oven at the bakery, the oven is on, unsure if the staff can turn it off,” the dispatcher says in the audio.

Another first responder later asks, “The person trapped in the – on their – did we turn off the power for that? Would the staff want to turn off the power?”…If we make contact.”

Shortly afterwards, however, another officer said that “the person was out of the oven when he arrived” and the matter was being handled by regional police.

Officials have not yet identified the victim. PEOPLE has requested copies of the first responder audio in connection with the investigation.

Halifax Regional Police said they were called to the Walmart location around 9:30 p.m. local time on Saturday, October 19, for a report of a “sudden death.”

“A 19-year-old woman who was employed at the store was found dead,” a news release dated Monday, Oct. 21 said.

Police added that investigators are “working closely with the Occupational Safety and Health Administration and the Nova Scotia Medical Examiner Service to determine the cause and manner of death.”

In another update posted on Tuesday, Oct. 22, police said the woman was “found in a large walk-in oven that is part of the bakery section of the store.”

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Authorities said their investigation was ongoing and would be “complex” and involve “multiple partner agencies.”

“An investigation of this nature can take a significant amount of time,” police said, urging the public “to be alert to the sharing of speculative information on social media.”

According to the CBC, Constable Martin Cromwell told reporters on Monday about the investigation: “We just want to encourage the public to be patient with our investigation and to be aware that family members and colleagues are involved.”

When contacted by PEOPLE, Cromwell had no further information to share.

In a statement to PEOPLE on Wednesday, October 23, Walmart spokesperson Amanda Moss said, “Our deepest thoughts go out to our associate and his family.”

“Our focus remains on taking care of our employees and ensuring they have the support they need,” Moss said, adding, “Our store remains closed until further notice.”