Visitors at an Adelaide ice skating rink have been treated in hospital after suffering suspected carbon monoxide poisoning.

A group of 16 people attended Royal Adelaide Hospital in the early hours of Sunday morning after visiting the Ice Arena at Thebarton on Saturday.

Some of the patients needed oxygen while others were observed.

All are now in a stable condition and are expected to make a full recovery, SA Health said in a statement.

Symptoms of carbon monoxide poisoning include headache, tiredness, nausea and in more severe cases, shortness of breath.

Chief Public Health Officer Nicola Spurrier said anyone who had attended the rink and had symptoms should seek medical help.

“Pregnant women and very young infants are also advised to be checked regardless of symptoms,” she said.

Fire crews have been at the arena overnight to determine the cause of the incident.

-AAP