  An example of higher-derivative theory with a non-Abelian gauge symmetry is
proposed. In the free limit, the model describes the multiplet of vector
fields, being subjected to the extended Chern-Simons equations. The theory
admits a single second-rank conserved tensor, whose 00-component can be bounded
or unbounded from below depending on the model parameters. If the conserved
tensor has a bounded 00-component, the dynamics is stable. The equations of
motion are non-Lagrangian.
