Video shows the moment that Olympic kitesurfer Bruno Lobo rescues a woman who appeared to be drowning at sea.

The athlete was practising with a new camera, while kitesurfing off the coast of São Luís in Brazil when he heard someone screaming.

Lobo, who is also an orthopaedic doctor, helped the woman onto his back and used his kite to carry her to the shore.

The woman appeared to meet friends on the shoreline and walk off the beach. "I only did my duty" and was "in the right place at the right time" Lobo said in a self-filmed video on Instagram.

The athlete said he wanted to use the opportunity to warn people on social media that "the sea is really very dangerous" and "the tide can pull you out to sea".

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