The fatal stabbing of a man in the resort of Malia in Crete has led to the arrest of 18 young British men.
The 20-year-old victim was also from the UK and was stabbed outside a bar in the early hours of Tuesday morning.
Eyewitnesses told Greek police a violent altercation took place involving at least 30 British men, according to Athens-based newspaper Kathimerini.
Malia has outgrown holiday resorts such as Ayia Napa and Laganas and is particularly popular among young British tourists.
British ambassador John Kittmer visited the resort earlier this year to launch the Holiday Hangover campaign, to raise awareness of problems that could arise while on holiday and to promote responsible behaviour.
The Foreign & Commonwealth Office says about two million British tourists visit Greece every year. About half the cases it becomes involved in concern young tourists on holiday in the resorts of Malia, Laganas, Kavos, Kardamena or Faliraki.
An FCO spokesman told the BBC: “We are aware of the arrests of a number of British nationals. We are in touch with the local authorities and stand ready to provide consular assistance.”