Korean navies clash on disputed ocean border
Updated
Tensions on the Korean pensinula have been brewing for months, and today exploded into a military clash between North and South Korea. According to South Korea's Yonhap news agency, a North Korean patrol boat crossed a disputed border in the Yellow Sea, prompting the South Korean navy to fire at it - first in warning, then for real. No casualties were reported during a subsequent exchange of fire, but the North Korean ship appears to have sustained heavy damage.
Pyongyang wants a full apology, while political observers in South Korea say the North may have deliberately sought to up the ante, eight days before a visit to Seoul by US President Barack Obama.
Presenter: Mark Colvin
Speaker: Mark Willacy, North Asia Correspondent
