DFDS Vice President Gert Jakobsen told ITV News that 15 passengers and eight crew members were treated for smoke-related injuries on the King Seaways ferry following a fire on board.
Four crew members and two passenger were later taken to Scarborough Hospital by helicopter for further treatment. Police are investigating the incident.
More top news
The dangerous Khumbu icefall has been rendered impassable after an avalanche, trapping climbers on Mt Everest. Here's what you need to know.
A company included in a letter supporting the Tory Party said one of its staff members had been wrongly listed as a signatory.
Customs officials in Thailand seize 3 tons of ivory hidden in tea leaf sacks from Kenya in the second-biggest bust in the country's history.