Google's executive chairman Eric Schmidt will visit North Korea, marking the first high-profile visit from the US-based tech giant to the reclusive Asian nation.

Mr Schmidt will travel on a private humanitarian mission led by US Democrat politician and former New Mexico governor Bill Richardson later this month. Mr Richardson was also the US ambassador to the UN and has visited the country several times since 1994.

But the reasons for the Google chief's visit remain unknown. North Korea is considered to have the world's most restrictive cyber policies, though its leader Kim Jong-Un is currently pushing for scientific and technological advances in the country.

North Korea does not hold diplomatic relations with the US, and has almost no business with any American companies. For Google, North Korea is the final frontier of cyberspace as part of its broader vision to bring the internet to the world.

Written and presented by Alfred Joyner