Two Irish adventurers have been forced to abandon their attempt to walk 778km to the North Pole.

The LifeProof Ice Project team of Clare O'Leary and Mike O'Shea announced the decision "with deep regret" following an accident on Sunday.

A falling sled is said to have caused injuries to both.

A charter flight scheduled to resupply the team yesterday was able to land on the ice at the team's location and bring them safely back to Resolute in Northern Canada.

O'Leary and O'Shea are expected to make their return journey to Ireland over the next 7 to 10 days.