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.

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.

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.