A British serviceman was discovered dead in Sweden just a few days after a military drill.
According to the Swedish newspaper Expressen, the unidentified 25-year-old went aboard HMS Albion during the Aurora 23 defence exercise between April 17 and May 11.
He spent the evening with another Royal Navy sailor in a residence in Solna, northwest of Stockholm, where he was subsequently discovered dead.
Swedish police have arrested four people in connection with the death, including the serviceman he was out with.
Three Swedes in their 20s and 30s were also detained.
Police are still in the early stages of their investigation and have not revealed how the man died.
The Ministry of Defence said: ‘We are aware of an incident in Stockholm and we are assisting local authorities in their investigation. It would be inappropriate to comment further.’
The Swedish Armed Forces said the Aurora 23 exercise was the largest national exercise of its kind in more than 30 years, involving troops from 15 countries.
Both the RAF and the British Army were involved in the drills.
Its purpose was to increase the ability to deal with an attack on Sweden, which has been heightened since Russia invaded Ukraine last year.
Before the HMS Albion set sail for the exercise, Captain Marcus Hember, Commanding Officer of the ship, said: ‘Albion and the Littoral Response Group’s last period of operations took us north to Arctic Norway, where we participated in a significant Joint Expeditionary Force exercise.
‘Our next period of operations is going to take us to the Baltic, where again we’ll be exercising with allies and partners and demonstrating the UK and the Royal Navy’s commitment to Northern European security.
‘Albion has embarked marines and a wide range of equipment from 45 Commando as well as from across the UK Commando Forces enterprise.
‘We’re looking forward to getting back out there and showing our commitment to security at this difficult time.’