Police in Memphis, Tennessee, have arrested a suspect after four people were killed and three others wounded in a series of shootings on Wednesday.

The latest: Memphis Police Chief Cerelyn "C.J." Davis said at a briefing early Thursday at least one of the shootings was broadcast on Facebook live. In another broadcast, the suspect was "threatening to cause harm to citizens," Davis said.

Details: Police said the first shooting occurred about 1am when a man was fatally shot, while the others happened after 4:30pm and continued until roughly 8:30pm. The crime scenes included at least seven shootings and a carjacking in Southaven.

Meanwhile, a spokesperson for Facebook's parent company, Meta, said in an emailed statement it had been in "direct touch" with Memphis police shortly after the initial public alert was issued in the evening on the search for the suspect.

What they're saying: Facebook was "working closely with law enforcement on this matter," said Sackin, adding: "This is a developing situation and we have teams working to remove violating content related to this incident."

The big picture: The Tennessee shootings mark the latest instance of gun violence in the U.S. and another with reports of an attack being broadcast online.

Of note: Facebook has moved to tighten its live-streaming rules since the New Zealand mosque attacks terrorist broadcast the mass shootings online in 2019.

Editor's note: This article has been updated with new details throughout.