Heusenstamm (dpa/lhe) - After the forest fire near Heusenstamm (Offenbach district) on an area of ​​around 15,000 square meters, the investigators assume arson. Numerous fire brigades from the Offenbach district were involved in the firefighting work lasting several hours on Sunday. It burned forest floor as well as trees and bushes. Several witnesses were still being evaluated, the police said on Monday in Offenbach.