About 90 families from North and South Korea have wept and embraced as the neighbours held their first reunion events in three years for relatives wrenched apart by the Korean War for more than six decades.

Some struggled to recognise family having not seen them in more than 60 years.

The brief reunions are set to total just 11 hours over the next three days in the North's tourist resort of Mount Kumgang after exchanges were revived this year following a standoff over Pyongyang's nuclear and missile programs.