A probe is continuing into an arson attack at a house in Sheffield while a woman and three children slept.
The woman and youngsters were forced to flee their home in Montford Drive, Burngreave, after discovering a blaze at 12.40am on Thursday, May 25.
South Yorkshire Police said an accelerant was set alight after it was poured through the letterbox of the property.
The fire caused damage to the front door and entrance hall but the woman and children inside managed to escape unharmed.
A 21-year-old man on suspicion of arson was questioned and later released under investigation while inquiries continue.
A South Yorkshire Police spokeswoman said: "There have been no further arrests, the investigation is ongoing.
"The man previously arrested was released under investigation, this remains the same."
Anyone with information should call South Yorkshire Police on 101.