Austin Police Department says 13 people were injured in a shooting in Austin; the suspected shooter has not been arrested.

Law enforcement officials in Austin, Texas, arrested one suspect in Saturday morning's mass shooting in the city's entertainment district that left at least 14 people wounded.

Two of the victims were in critical condition, while the other 12 were stable, interim Austin police Chief Joseph Chacon said, adding that almost all of the victims were innocent bystanders.

"There was a large crowd of people that were there at that time," Chacon said.

After shots were fired, police officers were on the block and able to respond within seconds, immediately starting life-saving measures such as applying tourniquets and other first aid, the chief said. .

"We had 14 people that were shot, and none of them to this point have lost their life," Chacon said

Chacon also lamented staffing shortages at the Austin Police Department, saying the Texas Department of Public Safety has agreed to send officers to help with security Saturday night.