Mijailo Mijailovic, 26, who is serving a life sentence in a maximum security jail in Kumla, west of Stockholm, has been moved to a psychiatric unit in Sundsvall, exactly two years after the bloody attack.
“He is not well and a doctor decided he needed psychiatric help,” the asylum’s director Christer Karlsson told the radio station.
Sweden commemorated the second anniversary of Lindh’s death this weekend.
The country was sent into a state of shock in 2003 after the popular minister was stabbed repeatedly by Mijailovic as she shopped at a Stockholm department store on September 10.
The 46-year-old, mother of two, died of massive internal bleeding some 13 hours later on September 11.
A remembrance service at the Stockholm’s Katarina church cemetery will be held by Lindh’s Social Democratic Party on Sunday.
Mijailovic, who had a history of mental problems, admitted to Lindh’s stabbing and claimed during his three trials he heard “voices” telling him to attack her. However he insisted he did not mean to kill her and had no motive.
Mijailovic has renounced his Swedish citizenship and is now only a citizen of Serbia and Montenegro where he has asked to be transferred.