Fire officials are looking into what may have caused the fire inside the vacant home at 11 Lake Street, early Friday morning.
A second vacant house fire in Norwich has fire officials and community members on high alert.
A fire at 11 Lake Street, early Friday morning left the home with extensive damage to the second and thirds floors.
Investigators said the home was vacant and that the power was shut off and the cause of the fire is still unknown.
Chief Kenneth Scandariato, of the Norwich Fire Department, said he did not know if the fire was suspicious.
"I don't know. We had to wait for legal to allow us a criminal warrant to get in and now that we have a legal warrant to be here, we’re going to look again,” Scandariato said.
Monday, on Oak Street, another vacant home in the area went up in flames, fueling suspicions of squatters possibly setting the fire.
Anthea Ramkisson, a neighbor, initially called 911 when she saw the flames on Friday and now fears the worst.
"If it’s not someone who's crazy, it has to do with something with insurance for the houses, because this never happened before in Norwich,” Ramkisson said.
On Friday, NBC Connecticut asked officials if squatters could have been an issue at the 11 Lake St. house fire and officials said they do not believe that was the issue.
"I don't believe squatters were an issue in this fire. It seems with the building being under foreclosure, there were people frequenting the building, but right now it's all speculative," Scandariato said.
State fire marshals are investigating both fires.
Firefighters in West Haven responded to Union Avenue for a fire on Friday morning.
No injuries have been reported.
Officials are investigating both fires.