Rio Olympics 2016: Katie Ledecky beats Jazz Carlin in 800m freestyle

Jazz Carlin won Olympic silver for Great Britain in the women's 800m freestyle, as Katie Ledecky secured her fourth gold medal of the Rio Games.

American Ledecky, 19, took nearly two seconds off her own world record to win in eight minutes 4.79 seconds, nearly 12 seconds clear of the rest.

Welsh star Carlin, 25, was her nearest challenger, securing her second silver of the Games after finishing second in the 400m freestyle earlier in the week.

Hungary's Boglarka Kapas took bronze.

Ledecky's dominant display rounded off a stunning debut Olympics with a world record nearly 14 seconds faster than what it stood at when Rebecca Adlington set it at the Beijing Olympics.

"I had a lot of fun tonight," Ledecky said. "I just wanted to push myself and see what I could do."

Carlin secured Britain's fifth swimming medal in Rio.

Siobhan-Marie O'Connor in the 200m individual medley and the men's team in the 4x200m freestyle relay also won silver.

Adam Peaty is Britain's only gold medallist so far after winning the 100m breaststroke gold.

"I couldn't do it without my family," said Carlin after the race. "They have been there through the tough times and it is nice that they can be here.

"Two silver medals, it is an incredible feeling. I'm finally believing in myself."

• Day-by-day guide to what's on

• Latest medal table

Subscribe to the BBC Sport newsletter to get our pick of news, features and video sent to your inbox.