The car in the garage didn’t blow up. Four small pressurized containers also found there didn’t suddenly fail and explode.

These are two small answers on a long list of questions in the investigation into a deadly house explosion that rocked an east-end Scarborough neighbourhood earlier this week.

There are still many mysteries, such as what type of fuel led to the blast.

“I really don’t know at this point in time what we’re dealing with,” Wayne Romaine, of the Ontario Fire Marshal’s office, told media Wednesday.

But Romaine confirmed that a neighbouring home must be completely demolished as a result of the blast. That work is expected to start tomorrow.

The demolition of 3358 Brimley Rd., next door to the blast, and its cleanup are necessary steps that will give investigators access to the gas line between the houses, a specific area of interest for investigative crews.

He said about eight other homes in the area still cannot be occupied.

Shifting through the debris at the site of the explosion will be a slow, methodical process that will keep workers at the scene into the weekend, Romaine said. Crews will be examining and shifting the debris by half a metre at a time.

Emergency crews were called to 3356 Brimley Rd. in Scarborough’s east end at about 4:30 p.m. Monday, after a gaseous explosion flattened the home.

Paul Zigomanis, 57, was pronounced dead at the scene. Romaine said an autopsy has been completed, but a cause of death has not been released. A woman was also treated for minor hand injuries at the scene.

The blast sent large pieces of debris flying through the air, creating a wide base of evidence for crews to map and sort through. Some of it was piled up to two metres high.

Large bins are also being brought in to collect piles of wood, personal belongings and other debris.

Once the digging is done, crews will try to reconstruct the natural gas delivery system to see whether it was tampered with before the explosion, Romaine said.

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It isn’t yet clear whether the cause of the blast is suspicious or criminal in nature. Romaine told reporters at the scene that “everything is on the table.”

“As we are de-layering the debris, we’ll be looking for any type of material that might relate to this explosion, whether it be in a criminal nature or whether it be in an accidental nature,” Romaine said.