The family of an Ottawa man who hasn't been heard from since Wednesday is anxiously waiting to find out if he was the victim of a fatal fire in Vanier.

Said Kasbary's family told CTV Ottawa they have not heard from him since he went to work on Wednesday.

Although Kasbary is missing, his car remained at the scene on Thursday, and all indications point to the likelihood that he was in the building at the time of the blaze.

Police have confirmed one man was killed in the suspicious fire that lit up an apartment building in the 300 block of Blake Boulevard in Vanier just before 7 p.m. on Wednesday.

A man's body was found inside. However, his identity has not been released.

"It's deemed a suspicious death. Ottawa police major crimes is investigating," said Const. J.P. Vincelette.

While co-workers say Kasbary had no enemies, the building's superintendant told CTV Ottawa that he was supposed to deliver an eviction notice to a tenant in a building next door the night of the fire. That tenant was also a former employee who was fired for stealing, according to Andre Bard.

Although one man is in custody, his name has not been released and charges have not yet been laid.

The building's property manager told CTV Ottawa she spoke with her boss about an hour before the building's office went up in flames.

"We know he was there and his car is still here," said Diane Leblanc.

She told CTV Ottawa Kasbary called her and another employee at about 6 p.m. asking them to come into work. She said he didn't give a reason for the request, and neither one of them were able to come in.

"He was a great landlord, a great owner, a great friend. Anything you needed – when I was sick he'd ask me if I needed anything," she said.

The building's basement seems to have experienced the most damage, and is partially covered by a blue tarp. Residents living in the building have been able to return to their homes.

The Ontario fire marshal's office has been called in to probe the cause of the blaze.

Anyone with information about the fatal fire is asked to contact Ottawa police at 613-236-1222, ext. 5493 or Crime Stoppers at 613-233-TIPS.

With a report from CTV Ottawa's John Hua