Most of the 565 guests in the five-star hotel in Tunisia where a gunman killed 27 people on Friday are from Britain and "central European countries", the hotel's managers said.

"The majority of the guests are from the UK and other central European countries. However, it is not possible at the moment to confirm the nationalities or any other details of the victims," the RIU group, which runs the Riu Imperial Marhaba Hotel, said in a statement.