German prosecutors said Tuesday they have scrapped an investigation into comedian Jan Boehmermann for allegedly insulting Turkish President Recep Tayyip Erdogan, after failing to find evidence to back up the claim. 

"The results of the investigation show that criminal acts could not be proven," prosecutors said in a statement, adding that they were therefore halting the probe into Boehmermann, who had accused Erdogan of bestiality and paedophilia in the so-called "Defamatory Poem".