A couple who live next door to the house in Bolton, who did not wish to be named, said they were woken by an explosion, which apparently came from the kitchen area of the property. They then saw smoke fill the building.
Stuart Whittle, who lives opposite, said he arrived home in the early hours to a fog of smoke.
He said: "As I got closer I could see fire engines and police cars. I didn't think anyone was in the house."
Another close neighbour, Maria Taylor, 48, said she was woken by the sound of fire engines and then heard smashing glass as firefighters broke in to gain access to the property.
More top news
At least 100 people have been killed in Pakistan after an oil tanker overturned and burst into flames, according to reports.
Authorities call for government to step up funding in the wake of the Grenfell fire to help evacuate and renovate other blocks.
Donald Trump has accused Barack Obama of failing to take action over Russia's alleged interference in the US election.