South Korean candidates vie for young voters

Several candidates have formally registered to take part in the three-week campaign for the South Korean presidency.

But the 19 December poll is largely seen as a two-horse race between ruling Saenuri Party candidate Park Geun-hye and her Democratic United Party rival Moon Jae-in. Both are fighting for the support of South Korea's youngest voters.

As Seoul correspondent Lucy Williamson reports, the race couldn't be tighter.