An unidentified person died in a morning fire in South Arlington on Tuesday.

The Arlington County Fire Department was called to 2922 S. Buchanan St. at approximately 7:25 a.m., Capt. Gregg Karl said.

Firefighters arrived to find smoking coming from the top floor of a garden-style apartment building, he said.

The fire chief requested a second alarm, he said.

"As they were extinguishing the fire, they found one victim, a fatality," Karl said.

Karl said he had not heard any reports of anyone else being in the apartment before or during the fire. He said he believed it was contained to a single apartment.

The Fire Marshal's Office is working with police on this matter.

Investigators aren't ready or able to say this death was related to Hurricane Sandy, Karl said.