Updated at 4:54 p.m.
ANNAPOLIS, MD — The deadly house explosion that occurred in the Cape St. Claire area of Annapolis on Wednesday was ruled accidental in nature by investigators.
The Anne Arundel County Fire Department said on Friday that investigators also determined that a visit by a propane vendor at the home "did not cause or contribute to the explosion."
Officials said the man injured in the explosion — 76-year-old Stan Synowczynski — remains hospitalized in critical condition at the Johns Hopkins Bayview Medical Center.
Related: Officials ID 76-Year-Old Woman Killed In Annapolis House Explosion
The deadly home explosion occurred on the 1100 block of Green Holly Drive, and was reported to authorities around 12 p.m.
Early on in the investigation, officials said that a propane vendor had been at the home about an hour before the explosion to refill a tank.
The latest update comes a day after authorities identified Linda Synowczynski as the 76-year-old woman who died after the explosion prompted the second floor of the home to collapse.
She was pronounced dead at the scene after going into cardiac arrest.
Two other individuals — a neighbor and a police officer — suffered injuries at the scene. The AACFD said the neighbor was treated for exhaustion and a police officer was hospitalized for a non-life-threatening injury.
Joseph and Benjamin Toms, two of the neighbors who rushed to help at the scene, earlier described to reporters the moment they helped pull Linda from underneath debris.
"We started to try to get her out, and finally two other neighbors rushed in," Joseph said. "They helped us lift it up, get her out, and that's when the first responders came in."
The brothers later searched the scene for Stan, who was transferred to Bayview by helicopter.
An investigation into the explosion remains ongoing.
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