ORANGE PARK, Fla. -- As many as ten families are displaced Saturday following a large fire at an apartment complex in Orange Park, according to the Clay County Sheriff's Office.

JFRD initially tweeted Saturday night that people are reportedly trapped inside an apartment structure fire with heavy flames showing at the Kings Tree Apartment complex in the 1800 block of Kingsley Avenue.

CCSO spokesman Keith Smith said after a lengthy search, they determined everyone got out safely. No injuries have been reported as a result of the blaze as well.

CCSO officials said the fire started in an empty unit. The building suffered significant damage causing the roof to collapse.

Neighboring departments including JFRD and St. Johns County Fire Rescue helped take out the flames. At a point, JFRD said they had to pull firefighters out of the building because it was deemed unsafe.

Witnesses at the scene said they heard a loud boom like an explosion. First Coast News spoke with one tenant who left in the middle of work after finding out his home was on fire.

"I'm shocked. It's unbelievable. I still don't know what happened to my apartment," said Vitaliy Chernyavskiy. "I'm really worried about the stuff inside."

Another man at the gas station next door said he was told by officials he wasn't allowed to leave as a safety precaution. He said he helped a displaced family by letting them stay in his car for warmth.

"Two of the families: this woman with two daughters, she came out crying. They had no shoes. People brought blankets for them and asked them if they were alright and she said 'We lost everything.' And the other family I allowed them to sit in my car cause it was so cold until family members came up to retrieve them," said Pastor Van Snead from Orange Park.

The state fire marshal's office is investigating the cause of the fire.

The Red Cross is also at the scene to assist those displaced by the fire.

Stay with FCN as we continue to follow this developing story.