From cellphone video taken by an Eyewitness News photographer Tuesday night, you can see how intense the smoke and flames were as crews worked to get a building's fire under control.

The building was a storage facility -- inside, among other items, were tires making the fire that much harder to contain.

"When you have things like tires and so forth burning, it makes it a lot more intense just because of the component itself. It makes it a lot hotter, it burns a lot longer and it just makes things more difficult," Rock Hill Fire Department Battalion Chief, Rusty Myers, said.

Myers said the building also had a metal roof. When it fell in, it was difficult to get to hot spots so a back hoe was brought in to help firefighters get to any remaining flames.

By the end of the night, the building was destroyed.

This morning investigators took pictures and began their investigation into what caused it.

"Determining where the fire started in this building is going to be difficult because there isn't anything left," said Myers.

But some clues may be in a police report.

A witness says he saw someone walking behind the storage building moments before flames broke out.

The person is described as a white man, about 5 feet 9 inches tall wearing a dark hooded sweat shirt.

Investigators have not said if they believe it was arson.

This fire comes a week after a McDonald's caught fire less than half a mile.

It was also destroyed.

Investigators say they don't believe the two are connected.