The Dallas County Medical Examiner's Office has identified two of the four people killed in three shootings early Sunday in the Deep Ellum district of Dallas, FOX 4 reports. They are Kaniesa Scott, 21, and Unique Elise Benjamin, 28. WFAA also reports that the medical examiner identified Benjamin.

Scott was pronounced dead at Baylor University Medical Center early Sunday, according to medical examiner records cited by FOX 4. Benjamin died in the roadway in the 200 block of South Crowdus Street, FOX 4 reports.

Relatives of Anthony Martin, known to friends as Quincy McCleary, say he was also killed, WFAA reports. His cousin, who gave only his first name, Mike, was with him in Deep Ellum when the shooting began. Mike said the two worked together at a solar panel company and that Martin was about to buy a house, WFAA says.

Scott's aunt, Talisa Townsend, described her as a hard worker who was paying her own way through college, WFAA reports.

Neither FOX 4 nor WFAA names the fourth person who was killed.

Police have made arrests and questioned several people, FOX 4 reports. Neither outlet reports that anyone has been charged, and neither names anyone in custody. Investigators have no evidence so far that the three shootings are linked, or what led to them, FOX 4 says.

The shootings took place over about 75 minutes on Elm Street, Main Street and South Crowdus Street, FOX 4 reports. About 15 people were hurt. Police Chief Daniel Comeaux said that number could change because some victims took themselves to hospitals, FOX 4 says.

Police are collecting security video from nearby businesses and asking anyone with photos or video from the area to contact Sergeant Boz Rojas, FOX 4 reports. Dallas Mayor Eric Johnson called the violence "unacceptable" in a statement, FOX 4 says.

What we know: The medical examiner has named two of the people killed, and a family has named a third.
What we don't: Who carried out the shootings, whether anyone will be charged, and whether the shootings are connected.