In the paper GRAVITATION AND ELECTROMAGNETISM (viXra-classical physics:1001.0017), we explained the gravitational and the electromagnetic phenomena through the mediation of "informatons". We started from the hypothesis that any material object manifests itself in space by emitting informatons. These are dot-shaped entities that rush away with the speed of light carrying "information" about the position, the velocity and - if it is electrically charged - the electrical charge of the emitter. We showed that informatons constitute the gravitational and the electromagnetic fields which make the interactions possible. In this paper we extend the theory to interactions between - electrically neutral - moving objects in relativistic situations.