(CNN) - Hindered by painful stings and strong currents, endurance swimmer Diana Nyad ended her latest attempt to swim from Cuba to Florida on Sunday morning, her team announced.
Nyad was pulled out of the water shortly after 11 a.m. following injuries sustained Saturday evening and strong cross-currents that were pushing her off course, her team captain Mark Sollinger said. The 62-year-old swam more than 67 nautical miles - about two-thirds of the distance.
Her swim had been halted Saturday night after being stung by jellyfish and Portuguese man-of-wars, but she returned to the water early Sunday morning in an attempt to complete the effort before deciding to halt.
"The medical team said I should not go another two nights in the water and risk additional likely man-of-war stings, which could have a long term cumulative effect on my body," Nyad said in a statement posted on her website. "But for each of us, isn't life about determining your own finish line? This journey has always been about reaching your own other shore no matter what it is, and that dream continues."
It was her third attempt to make the 103-nautical-mile swim from Cuba to Florida. Her first, in 1978, was brought to an end by strong currents and bad weather after almost 42 hours in the water.
She made a second try in August, before she was pulled from the water after 60 miles and almost 29 hours of swimming. She blamed a shoulder injury she suffered early in the journey, and an 11-hour-long asthma attack.
Her latest attempt, accompanied by shark divers, began just after 6 p.m. Friday from Havana's Hemingway Marina. The former world champion swimmer projected the swim would take close to 60 hours.
There was a bit of excitement early Saturday afternoon as an oceanic whitetip shark swam near Nyad, but a diver on her team faced it off and it meandered away.
The swimmer improved her performance late Saturday morning after struggling to maintain her usual stroke rate, her support team said. Fortified by chicken soup, Nyad was making good progress until the Saturday evening incident.
The sting was the second of the day. Earlier in the day, a Portuguese man-of-war stung her.
Nyad got back in the water at 12:20 a.m. Sunday.