  Signals for processes induced by QCD instantons are searched for in HERA data
on the hadronic final state in deep-inelastic scattering. The maximally allowed
fraction of instanton induced events is found at 95% confidence level to be on
the percent level in the kinematic domain 0.0001<x<0.01 and 5 < Q-squared < 100
GeV-squared. The most stringent limits are obtained from the multiplicity
distributions.
