The 27-year-old is detained on probable cause.
Since exactly what role and involvement is not something I want to go into further, says prosecutor Wictor Beyer to TT.
He does not want to comment on whether there are more suspects in the case. He cannot answer how the man responds to the allegations.
A decision on detention will be made no later than 12:00 on Wednesday.
Right now, the police are working quite broadly. They have heard a large number of people and continue to hold interrogations, says Beyer.
The incident occurred at a restaurant in the area at around 23:00 on Saturday. Several people were in the premises, and the man was shot to death with multiple shots.