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".
A number of people have been injured as a truck was driven into pedestrians on a street in Stockholm, Swedish police say.
Initial reports suggested the truck had smashed into the front of a department store in Sweden's capital city.
A police spokeswoman said officers were on the scene responding to the emergency call.
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.