A large search and rescue operation is underway off the coast of Brisbane to find missing Kiwi Jordan Kelly.
The 26-year-old was training for a surf ski competition in Moreton Bay with his friend, 28-year old Jack McDonald, on Saturday.
Kelly's girlfriend raised the alarm when the pair didn't return.
"In their heads, they planned for two hours and certainly hadn't prepared for any strife," says Brisbane Water Police Senior Sergeant Mitch Gray.
According to Snr Sgt Gray, McDonald's ski began to take on water on Saturday afternoon.
It's understood Kelly then paddled over to help and both ended clinging to their skis in the cold water until dark.
"They became weak and tired from being in the water and unfortunately Jordan slipped away," says Snr Sgt Gray.
McDonald managed to return to his ski and make it to shore. He's being treated for minor hypothermia.
Twelve boats and four helicopters are out looking on land and at sea.
"We're doing everything we can with everything we've got.
"As time goes on, certainly we become more concerned we're not going to have a happy ending to this scenario."
Kelly's parents live in New Zealand and his father and brothers and sisters are flying to Queensland.
"We're doing everything with the family to keep them informed and throw absolutely everything at this to bring him home," says Snr Sgt Gray.