The inquiry into why Sunderland's Peacocks store caught fire is yet to see investigators go into the wrecked building due to safety concerns.
Tyne and Wear Fire and Rescue Service has said its probe into the fire, which broke out on the night of Wednesday, January 23, and tore through the clothing shop, is ongoing.
Its officers have looked at CCTV from the area of Blandford Street, but are still unable to enter the shell of the store due to safety concerns.
The cause of the fire is not though to be suspicious.
Today, Ian Bell Fire, the service's safety group manager, said: “The fire investigation is ongoing into the cause of the blaze at Peacocks on Blandford Street Sunderland.
"We have viewed CCTV footage from the surrounding buildings to look at the fire development.
“We need to ensure that the building is made safe before we can enter to conduct the internal part of the fire investigation.
"The building is currently unsafe and we are unable to conduct this part of the investigation.
“We are conducting a joint investigation with the private fire investigators acting on behalf of the building owners and occupiers.
"The fence parameter is still in place on the street at the front of the building and will remain in place until the building is deemed safe enough to enter, this is to ensure the safety of people in the vicinity of the building.”
Last week, Sunderland AFC players and members of the club's management visited the street to show their support for businesses which neighbour the site, which has been cordoned off to pedestrians.
The fire service sent a high volume pump and an aerial ladder platform to the scene as part of its response to the blaze.
A timeline of the incident and how it was tackled can be found here.