Camacho was rushed to Centro Medico, the trauma center in San Juan, where he was in critical but stable condition, Dr. Ernesto Torres, the hospital director, told reporters.

The bullet apparently struck him in the jaw but exited his head and lodged in his right shoulder and fractured two vertebrae, Torres said. The doctor said the boxer, who was trailed by drug and alcohol problems during a career that included some high-profile bouts, could be paralyzed from the shooting.

"Camacho's condition is extremely delicate," he told Telenoticias. "His physical condition will help him but we will see."

No arrests have been made in the shooting, police said.

Camacho representative Steve Tannenbaum said he was told by friends at the hospital that the boxer would make it.

"This guy is a cat with nine lives. He's been through so much," he said. "If anybody can pull through it will be him."

The fighter's last title bout came against then-welterweight champion Oscar De La Hoya in 1997, a loss by unanimous decision. Tannenbaum said he was going to fight two years ago in Denmark until his opponent pulled out and that they were looking at a possible bout in 2013.