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(CNN) —  

A shooter injured 10 people early Sunday on Canal Street, on the edge of New Orleans’ French Quarter, and a person has been detained though not charged, police said.

The victims are being treated at local hospitals. Two of the victims are in critical condition, the New Orleans Police Department said.

The critical patients suffered gunshots to the torso, Chief Shaun Ferguson told reporters. No officers are among the injured, he said.

“An individual was detained near the scene,” police said, but her or his possible involvement in the shooting is under investigation.

No arrests had been made as of about 12:30 p.m. (1:30 p.m. ET), according to police.

Police received a call reporting a disturbance at 3:21 a.m. When officers arrived on the scene, they could hear gunshots and found victims immediately, NOPD spokesman Aaron Looney said.

There were so many people in the area that the officers were not able to determine who fired the shots, Ferguson said.

“We had officers right there within that very block that actually thought that they were being fired upon and took a position to respond to this,” the chief said.

It’s early in the investigation, and it isn’t clear what sparked the gunfire, he said.

A woman looks out from a McDonald's as police investigate the shooting scene Sunday.
Max Becherer/The Times-Picayune/The New Orleans Advocate via AP
A woman looks out from a McDonald's as police investigate the shooting scene Sunday.

The shooting address provided by police is a brief walk from the popular Bourbon Street, where tourists are known to congregate.

Paramedics and state and federal police also responded to the scene.

A witness who wished to remain anonymous told CNN he was on Canal Street across the street and on the same block where the shooting happened.

He heard a verbal altercation and “at least” five or six gunshots, and he saw sparks, but because of the crowd he could not see where the shots came from. People ran from that location, some toward the waterfront, and were in such a panic that they were tripping and falling on each other.

The Bayou Classic was played Saturday night at the Superdome, about a mile away. The rivalry game is played annually between Grambling State University and Southern University.

CNN’s Alta Spells and Natasha Chen contributed to this report.