A 10-year-old Stolt chemical tanker has been rocked by an explosion while berthed at the port of Ulsan in South Korea.

The incident aboard the 43,478-dwt Stolt Groenland (built 2009) occurred at around 11:00 local time, a company spokesman confirmed.

The Cayman Islands-flagged tanker also suffered a fire, but the extent of the damage is unknown.