German federal prosecutors have found no evidence that the attack on Borussia Dortmund's team bus was linked to terrorism.
In light of this finding, the case has now been returned to local prosecutors, according to Cooperativa.
The attack on the football team's bus took place on April 11 and injured defender Marc Bartra, before a Champions League match against Monaco.
After the attack three letters were found claiming that people with Islamist links had conducted the attack.
The authenticity of the letters could not be confirmed and no other evidence was found to corroborate the letters.
Currently prosecutors believe a trader identified as Sergei V carried out the attack for financial reasons, as he had made a low bid for shares in Dortmund team, thinking they would fall in light of the attack.