Cardiac arrest

A statement to ESPN said the 18-year-old was training with the University of Southern California (USC) basketball team when the incident happened.

"Medical staff was able to treat Bronny and take him to the hospital," it read.

"He is now in stable condition and no longer in ICU (intensive care unit)."

It added: "We ask for respect and privacy for the James family and we will update media when there is more information.

The 54-year-old was the only child of Elvis Presley and Priscilla Presley.

Priscilla confirmed the "devastating" news after earlier asking for prayers.

"It is with a heavy heart that I must share the devastating news that my beautiful daughter Lisa Marie has left us," Priscilla said in a statement.

"She was the most passionate, strong and loving woman I have ever known."

The announcement came hours after Lisa Marie was rushed to the hospital on Thursday (local time).

As the NFL enters the final weekend of the regular season, Hamlin has become the sport's most talked about player, with fans around the world rallying behind the 24-year-old who collapsed after making a tackle against the Cincinnati Bengals on Tuesday (NZ time).

Reuters reports Hamlin, who had to have his heartbeat restored on the field, spent most of the week on a ventilator in a Cincinnati hospital intensive care unit. He was taken off the ventilator overnight and spoke to the team today.