American swimmer Lilly King set a 50-meter world record for the breaststroke at the World Aquatics Championships as she claimed gold on Sunday.
According to the Associated Press (via ESPN.co.uk), King clocked 29.40 seconds, beating the former mark set in 2013.
It was King's second world record of the championship as she defeated Russian rival Yulia Efimova.
The previous world best was set by Ruta Meilutyte in Barcelona, but King knocked eight-tenths off the record.
King recently added the 100-meter breaststroke gold and world record to her achievements in Budapest, Hungary.
Efimova had defeated King in the 200-meter breaststroke, as King came in fourth.