PENNSYLVANIA, New York — A fire in a home in Pennsyslvania, New Jersey, has forced a number of people to evacuate, and it appears there may be at least one person in serious condition, authorities said.

The fire broke out Tuesday afternoon in a duplex at 5800 Piedmont Lane, in Penneyslvany Township, New Brunswick, said Capt. Brian Bowerman, of the New Brunswick Fire Department.

It’s unknown how the fire started, he said.

No one was injured in the fire.

Firefighters were called to the home about 10:30 p.m., Bowermann said.

They extinguished the blaze before it could spread.

The home is surrounded by homes and a vacant lot.

The fire damaged the rear of the duplex, and about 100 residents were displaced, he added.

The property owner has no further information, he told NJ Advance Media.

New Brunswick Mayor Raymond Buckley also issued a statement saying there were no reports of any injuries.

The blaze has forced evacuations for residents who live in the home, and the city has asked the National Weather Service to provide weather forecasts.

The New Brunswick Emergency Operations Center has also issued alerts for the area.