A man has been arrested in Germany on suspicion of the rape and killing of a Bulgarian investigative journalist Viktoria Marinova, officials said.
Bulgarian officials named him as Severin Krasimirov, a 21-year-old Bulgarian citizen.
Interior minister Mladen Marinov said investigators had found DNA evidence on the clothes and body of Ms Marinova, who was raped and killed on Saturday in the northern town of Ruse.
Mr Marinov said: "There is physical evidence to link to the murder."
He said Krasimirov, a resident of Ruse, had a criminal record for scrap metal theft.
The minister said investigators had spoken to Ms Marinova's family and friends and "there is no apparent link to her work".
Ms Marinova, 30, hosted a TV show last month featuring two investigative journalists who were detained for their work on suspected fraud involving EU funds.
Tsatsarov said the evidence suggested it was "a spontaneous attack, not premeditated."
Prime Minister Boyko Borissov offered condolences to her family and thanked investigators for their work.
While Ms Marinova didn't appear to have been closely involved in the fraud investigation, her show touched on a sensitive subject in Bulgaria, where corruption is endemic.
The Balkan nation, which joined the EU in 2007, was ranked 71st on Transparency International's corruption list last year.
