Eitorf (dpa / lnw) – After the fire in a gym in Eitorf near Bonn with estimated damage of half a million euros, the police are investigating on suspicion of negligent or intentional arson. The police said on Thursday that there was no evidence of a technical cause. There were no signs of a break-in either. The fire may have been accidentally or deliberately kindled from outside through a gap in the concrete facade. The fire in the gymnasium of a secondary school broke out in the back area on Wednesday evening for reasons that were previously unknown. It was under renovation and was not in use.