STAMFORD - Authorities are trying to determine the cause of a blast that leveled a two-story home in north Stamford yesterday.

Chopper 12 was above the scene today as fire officials sifted through the rubble that was left behind.

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Authorities believe a 500-gallon underground propane tank may have caused the home on Webbs Hill Road to explode. No one was seriously hurt, but nearby homes were evacuated as a precaution.

Police say they received a call at around 2 p.m. reporting a deafening blast and house fire at 305 Webbs Hill Road. They say no one was inside at the time, but the homeowner was at the back of the property near a pool house. He was conscious and speaking with emergency crews once they arrived, taken to the hospital and later released.

Officials say a firefighter was also taken to the hospital and treated for minor injuries.

It could be days before investigators determine the cause of the explosion.

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The Turn of River Fire Department says a lot of calls are coming in from people asking if propane tanks are dangerous to keep on their property. A manager at a nearby hardware store says homeowners should check their tanks at least once a week for possible leaks.