NBC Atlanta 11 Alive:

According to authorities, police used a "flash bang grenade" to distract the suspect when they felt their officers were in "immediate danger" on the scene.

All four of the firefighters taken hostage are safe and sustained superficial wounds during their recovery effort and one Gwinnett County officer was injured. According to authorities, the officers injuries are non-life threatening.

A sheriff's deputy said the gunman is upset that the house is in foreclosure, The Atlanta Journal-Constitution reported.

According to property tax records, the home where the firefighters were being held was foreclosed on in November 2012 by Wells Fargo, and the mortgage then sold to Fannie Mae.

Gwinnett County Police Cpl. Edwin Ritter said the unidentified gunman was facing eviction and wanted the power turned back on.

The identity of the deceased has not yet been released pending notification of next of kin.