Clarkstown Police investigators returned this morning to the West Nyack home that was destroyed Thursday afternoon by a massive fire that produced smoke that could be seen for miles away.

They continue to look for clues to what caused the blaze at 5 Alex Court, where four residents were able to safely escape. While police said they are uncertain of how the fire started, the fire is not considered suspicious.

Because of the size of the home and the extent of the damage done, police said they are expecting a lengthy investigation into the fire. Police confirmed today that the home's smoke detectors worked and alerted the residents in time for them to make their escape.