Halifax Regional Police have released the man they arrested in connection to a fatal fire that killed a 92-year-old man without laying charges.

When firefighters arrived at the home on the 3600 block of Acadia Street on Thursday just before 3 p.m. there were flames and thick black smoke coming out of the windows.

Once inside, firefighters discovered Daniel MacLennan. Firefighters and paramedics performed CPR on the front lawn, but he died in hospital.

MacLennan has lived on the street for at least 55 years.

An autopsy performed by the Nova Scotia Medical Examiner Service found the cause of death to be smoke inhalation.

Investigators arrested a 49-year-old man on Thursday evening. He was released around 4:40 p.m. the next day.

Police said the investigation is ongoing.

Neighbours remember soft-mannered man

Neighbours say they're shocked by MacLennan's death.

Carol MacIsaac, 72, moved into the neighbourhood when she was just three.

“Danny was a very, very quiet lovely gentleman. He minded his own business. He was never cross with people, he never hollered at a child.," she said.

MacIsaac said he worked at a rehabilitation centre building prosthetics for people with disabilities.

“I’m hurt and devastated over it and I feel so bad that a wonderful man is gone," she said.“It’s like a nightmare."

"Poor Danny didn’t deserve this. He wouldn’t kick an animal off the sidewalk, he wouldn’t. That’s just the kind of man he was. He just shuffled along and he minded his own business and he didn't hurt anybody."

Forensic and fire investigators are still investigating to determine the cause of the blaze.