Police and prosecutors in Gießen, Hesse said on Monday that they suspect the 22-year-old bar owner instructed two other men, also currently under arrest, to trigger the explosion so that the young businessman could in turn receive an insurance payout.
One of the two men was seriously injured in the fire and subsequent explosion and had to be treated in hospital. Five others were also slightly injured, mostly due to smoke inhalation and small wounds inflicted by flying debris, police told The Local.
The other man suspected to be behind the explosion was arrested after he turned himself in to police.
The owner is being investigated for inciting others to commit serious arson and attempted murder, while the other two are being investigated for attempted murder and serious arson.
So far all three have remained silent.