Police say one woman was shot dead in the parking lot of a Tennessee Church

A masked gunman entered a church in Tennessee on Sunday and opened fire, killing at least one person and injuring others before apparently shooting himself in the head, an official said.

“Medical personnel are treating 8 wounded church goers shot at Burnett’s Chapel Church of Christ,” the Nashville Fire Department tweeted Sunday. “Shooter among wounded.”

“This is a mass casualty situation,” the department said. “All of the wounded have been transported to area hospitals. The majority are older adults.”

CBS News reports that a member of the Nashville Emergency Management says there was an active scene at the church Sunday. They said they received multiple calls of shots fired.

The Seattle Times reports that at least six people were being treated for injuries after the shooting at the Burnette Chapel Church of Christ in the neighborhood in Antioch, according to Don Aaron, spokesman for the Metro Nashville Police Department.

This is a developing story and will be updated.