WORCESTER, MASS. (WHDH) - A married couple died overnight Tuesday after a fast-moving fire tore through a three-story home on Hancock Street in Worcester.

Firefighters found Juana Candelario, 59, and Daniel Gonzalez, 62, dead on the first floor of the home. Five adults and five children were displaced and two firefighters were also taken to an area hospital with exhaustion symptoms, according to Worcester Assistant Fire Chief Adam Roche.

“This is tragic for the city of Worcester,” Roche said in an early-afternoon press conference.

City officials in a statement said the Worcester Fire Department first responded to the scene on Hancock Street near 11:30 p.m. Tuesday. 

Roche said firefighters arrived having already received reports of people trapped inside.

“On arrival, the first arriving company found heavy fire on the first floor with conditions deteriorating,” officials said in a previous statement. 

“I saw lots of fire and I saw people coming out,” said neighbor Alexis Kostas.

WATCH: Officials provide update on deadly Worcester fire

Officials said crews entered the home where they simultaneously worked to extinguish the fire and search for people stuck inside. 

“They worked extremely hard trying to combine the extinguishment efforts and the rescue efforts in this particular incident,” Roche said. 

Candelario and Gonzalez were removed by firefighters and transported to a local hospital, where they were pronounced dead.

Pets, including a dog and three cats, also died in the fire.

A family member of the victims on Wednesday told 7NEWS as many as 13 people were staying at the home Tuesday night.

Relatives said the two who died were a husband and wife. The couple had been married for 30 years and Gonzalez died after rushing back into the home to try to save Candelario, relatives said.

Speaking on scene, neighbor Bassam Kahn said he rushed out from his home when he saw the fire.

“There was so much bad at that time, we couldn’t do anything because the fire [was] too much,” he said.

Roche said the house involved in this fire was an old building that utilized “balloon frame construction.” Such architecture, Roche said, allows fires to spread quickly through open spaces in a building’s walls. 

Roche said he was not aware of any safety violations related to the property. 

“Obviously the Worcester fire department keeps the family of the lost victims in our hearts and prayers,“ he said. “This is a difficult fire for the Worcester Fire Department but we’re a resilient group. And our firefighters did a valiant job and they really leaned back on their strategies and tactics to get a better outcome here.”

The cause of the fire remained under investigation Wednesday afternoon.

After crews left the scene, family members remained, with some seen trying to salvage belongings from the home.

By 4 p.m., flowers and candles lined the house’s driveway.

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