Four people are dead from a chain of events that began with a fatal shooting at a downtown Greenville apartment complex late Thursday afternoon and ended in an incomprehensible tragedy.

Authorities Thursday night were trying to fit together the pieces of two separate crime scenes — one at the parking garage at Main and Stone and the other at the Greenville-Pickens Speedway in Easley — in an effort to understand what happened.

The Coroner’s Office had not identified any of the people who were killed late Thursday night.

Investigators believe the deaths were a domestic incident and there was no threat to the public.

The Greenville Police Department first responded to a deadly shooting at 5:07 p.m. at the Main at Stone apartment complex, Police Chief Ken Miller said.

Miler said officers found a woman dead inside a vehicle on the third floor of a parking garage and were searching for the suspect, a 36-year-old woman who fled the scene in a black Jeep Patriot, possibly with children inside.

Less than two hours later, a news photographer on his way home from work noticed the suspect’s vehicle parked at the Speedway and called 911, according to Chief Deputy Creed Hashe of the Pickens County Sheriff’s Office

The SUV was locked, the engine was running, and there were three deceased people inside, Hashe said.

Investigators believe the deceased individuals are connected to the downtown Greenville shooting and includes the suspect in the first shooting.

Authorities would not release the ages or genders of the victims.

Hashe said the wounds are consistent with gunshot wounds.

At a news conference across from the Greenville-Pickens Speedway Thursday night, Pickens County Sheriff Rick Clark said the shootings tore apart "a lot of families."

"This is a tragedy that's senseless and hard to understand," Clark said.

The Greenville-Pickens Speedway was the scene of the discovery of three dead individuals.

At the beginning of the investigation, Miller said investigators believe the shooting was domestic-related.

Restaurant workers near the Main and Stone complex said they heard a single gunshot just after 5 p.m. A woman was fatally shot inside a vehicle, police said.

As police officers processed the scene in Greenville, Main + Stone residents walked around the third floor of the garage and outside the complex, talking among themselves about any details they had related to the case.

At least two tenants said the complex was generally safe, and they had never heard of any similar issues until Thursday. Outside, some leaned over their porches to take cellphone photos and video of police cars lined up on Main Street where traffic had slowed.

Main + Stone is a $20 million mixed-use development at the corner of North Main Street and East Stone Avenue. It opened in 2016 with 21,000 square feet of commercial space and serves as the gateway into the historic North Main community.