A new inquiry is to open into the 1986 assassination of the Swedish prime minister.
The shooting of Olof Palme remains unsolved despite responsibility having been claimed by 134 people and numerous leads.
He and his wife Lisbet had just left a cinema in Stockholm when he was gunned down in the street by a single assailant, leaving behind a nation in shock.
Palme, who was 59 at the time of his death, had led Sweden’s Social Democratic Party since 1969 and had dominated Swedish politics.
At least 10,000 people were questioned about the crime, but the gunman was never identified and the murder weapon never found. This situation was fuelled a number of conspiracy theories.
In 1989 Christer Pettersson, a petty criminal and drug addict, was convicted of the crime after Mrs Palme identified him in a line-up. He was subsequently acquitted and freed by an appeals court that dismissed Mrs Palme’s testimony as unreliable.
He later confessed his guilt to a newspaper, only to retract his statements. Pettersson died in 2004.
Now Stockholm's chief prosecutor, Krister Petersson (no relation), will head the inquiry.
He was reported in Swedish media as saying that his mission was to try to solve the murder and that he was optimistic of a breakthrough.
"I feel honoured and I accept the mission with a great amount of energy," he said in a statement. "It is an interesting and important task."
