The 16-year-old is requested to be detained for probable cause for attempted murder in two cases, after the act of violence in central Västerås on Tuesday when two men were seriously injured.
The prosecutor demands that the suspect should not be allowed to receive visits or mailings, nor to follow the news media.
P4 Västmanland was the first to report that the arrest negotiations will take place.
Special reasons are required for a minor to be detained.
This means that people under the age of 18 are arrested mainly when they are suspected of very serious crimes or when there are other strong reasons for arrest.