US military claims helicopter 'hard landing' near N Korea border

The US military claimed one of its helicopters carrying Marines executed a hard landing near the North Korean border "while conducting routine flight operations".

A statement said the US Marine Corp. CH-53E Super Stallion had 21 people on board including five crew members, all of whom were taken to hospital.

File photo of a CH-53E Super Stallion used by the US military. Credit: REUTERS/US Marine Corps/Capt. Roger Hollenbeck/Handout

Fifteen people have been released from hospital and six are in a stable condition.

"A comprehensive investigation will take place to determine the facts and circumstances surrounding this incident", the statement added.