FORKS TWP., Pa. -

It appears a massive fire that destroyed a home under construction in Northampton County was no accident.

The fire late Sunday night was so big and intense that it damaged four homes around it, including one across the street. 

People we spoke with Monday were talking about the intense heat from the flames.

One home that was damaged had all the siding is melted on the back of the home and the homeowner said even blinds in one room started to melt, as well.

The fire started around 10 p.m.

"My husband got up to get a drink and he saw the glow from the fire," said neighbor Hollie Kothstein, adding that the unfinished home went up fast.  "I called 911 and by time I got out of the house and over to the corner over there it was just fully engulfed."

The homes behind the blaze and across the street were damaged, as well.

"It turned into an inferno," added another neighbor, Frank Fossa.

As the wind shifted, the flames actually went into Fossa's home and burned the master bedroom.

"That is my master bedroom up there," he said, looking at the burnt side of the home. "There is a lot of water and smoke damage throughout the entire house." 

Forks Township officials are still trying to find the cause of the fire, but investigators told 69 News that "the fire is suspicious, and we know it didn't start by itself."

"I wish I would have seen something so I know to give somebody information, but we didn't see anything," said Kothstein. 

"It's a little scary. I have three kids and I'm more fearful for them," added Fossa.  

The Fossa family is currently living with friends because of all the damage.

Neighbors are already lending a helping hand. There was a fundraiser for the family at the Forks Community Park at 6 p.m. Monday.