Four people suffered gunshot wounds near Neches and 6th Streets, Austin-Travis County EMS tweeted early Sunday morning.
“All patients have not expected to be life-threatening injuries,” emergency medical services said.
Austin police secured the area and urged people to avoid the area while the suspect was at large.
By mid-Sunday morning, a suspect was in custody, the Austin Police Department tweeted.
Neither the suspect’s name nor a motive have been released.
“If you have any information, we are asking you call Crime Stoppers @ 512-472-TIPS,” Austin police said.
Sunday marks the last day of the SXSW festival, a two-week-long event bringing thousands of people to the Texas capital.