A Roman Catholic priest who floated off under hundreds of helium party balloons was missing off the southern coast of Brazil today.

Rescuers in helicopters and small fishing boats were searching off the coast of Santa Catarina state, where pieces of balloons were found.

Reverend Adelir Antonio de Carli lifted off from the port city of Paranagua yesterday afternoon, wearing a helmet, thermal suit and a parachute.

He was reported missing about eight hours later after losing contact with port authority officials, according to the treasurer of his Sao Cristovao parish, Denise Gallas.