North Korea threats: Fidel Castro issues warning

North Korea should not risk a war which could "affect more than 70% of the Earth's population", the former president of Cuba has warned.

In a rare written commentary piece, the reclusive Fidel Castro described the situation on the Korean peninsula as "incredible" and "absurd".

He also warned that it posed the greatest risk of nuclear conflict since the Cuban missile crisis in 1962.

Sarah Rainsford reports from Havana.