Diana Nyad chases longtime Cuba-Florida dream swim

Team members for Diana Nyad report the 62-year-old endurance athlete has been stung four times by jellyfish while continuing her quest to swim from Cuba to Florida in shark-infested waters.

A team member posted a message on Nyad's Twitter account that the American had logged more than 10 hours in the water by nearly 2 a.m. EDT Sunday. Her goal: to become the first to set a record 103-mile (166-kilometer) unassisted crossing without a wetsuit or shark cage.

Karen Richardson said, "She described the pain as a 5 and kept on swimming.  She's not backstroking from fatigue but simply to try and get through what seems like a swarm with the most covered part of her head."

According to a tweet that crossed around 5 a.m. Sunday, even her handlers had to move to keep the jellyfish from stinging their feet and legs.

Nyad was stung on the lips in the second of the four encounters with jellyfish but kept swimming, her team says. She left Cuba Saturday in her latest bid to cross the Florida Straits since last summer, when first an asthma attack and then jellyfish stings forced her to abandon separate attempts.