The British man who was killed in the Sweden lorry attack has been named as 41-year-old Chris Bevington.
Two Swedes and a Belgian national were also killed when a hijacked lorry ploughed into pedestrians in Stockholm on Friday.
Rakhmat Akilov, a 39-year-old man from Uzbekistan, has been arrested on suspicion of "terrorist crimes through murder".
Swedish citizens are expected to deliver a show of solidarity against terror as the nation prepares to formally mourn the victims of the lorry attack in Stockholm.
Hundreds of people laid flowers close to the scene of Friday's attack, including Prime Minister Stefan Lofven, while a street demonstration is anticipated on Sunday.
Mr Lofven confirmed a minute's silence will be held across Sweden at midday on Monday to commemorate the dead.
A 39-year-old man from Uzbekistan has been arrested on suspicion of "terrorist crimes through murder" after the attack which claimed four lives.
The main suspect in the Stockholm lorry attack has admitted to carrying out a terror crime, his defence lawyer said.
The Ahlens department store in Stockholm apologised "for a bad decision" in promoting the offer.
The British man who was killed in the Stockholm lorry attack has been named as Chris Bevington.