A man is fighting for his life following a gas explosion at a home in Sunderland.
Emergency services were called to the "significant" explosion on Whickham Street in Sunderland just before 4pm on Tuesday.
Northumbria Police initially said two men were taken to hospital but their lives were not thought to be in danger.
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However, officers confirmed on Wednesday morning that one man's condition has "deteriorated" and he is now in a critical but stable condition.
A Northumbria Police spokesperson said: "At 3.45pm yesterday (Tuesday) we received a report of a suspected gas explosion at an address on Whickham Street, Sunderland.
"Two men were taken to hospital. One man’s condition has since deteriorated and he is currently in a critical but stable condition."
Tyne and Wear Fire and Rescue Service also attended the scene along with an air ambulance and Sunderland City Council staff who installed a blockade around the affected area.
A Tyne and Wear Fire and Rescue Service (TWFRS) spokesperson said on Tuesday evening: "This has been a significant explosion and there has been substantial damage caused to the property in question.
"Thankfully our crews were quickly on scene alongside our other blue light partners to assist two male casualties from the area and they have since been transferred to hospital.
"We will remain in the area alongside our partners this evening to assess the site and ensure it is structurally safe. Some residents in the immediate vicinity have also been evacuated as a precaution.
"We know this will be concerning for local residents and we would ask that anyone present in the area listens to the advice and instruction of the emergency services."
Gentoo also offered those who have been affected free accommodation.
You can follow our live blog on this ongoing incident here.
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