Upon arrival at the home in Valhermoso Springs, south of Huntsville, Morgan County sheriff's deputies found part of the home on fire, AL.com reported.
After the blaze was extinguished, they located the bodies of the victims, who included males and females, the sheriff’s office wrote in a Twitter message -- but no ages or identities were disclosed.
Authorities later said the victims were four men and three women, AL.com reported.
"It is a horrific scene and to be able to process it will take some time,” Officer Mike Swafford of the sheriff's office told a local TV news station. “We don’t have a motive at this time. We don’t have a determined suspect at this time. Investigators are following leads to piece together exactly what happened and who was involved. We can say we don’t believe there is an active threat to anybody in the area.”.
"We don’t have a motive at this time. We don’t have a determined suspect at this time. Investigators are following leads to piece together exactly what happened and who was involved."
The neighborhood is known for heavy drug activity and deputies have frequently visited the house, an AL.com reporter posted on Twitter.
An investigation was continuing but authorities said the public faced no immediate threat.
The sheriff's office was working with the FBI Violent Crimes Taskforce, authorities said on Twitter.
There was no mention of any suspects being at large or in custody, WBMA-LD of Birmingham reported.
The shooting took place in Valhermoso Springs, about 21 miles south of Huntsville, near the Tennessee River.