           p2.neigh_pid(p2.neigh_pid==p1.id) = [];

                            <span class="comment">% Delete interaction object</span>
                            delete(int);
                            rmv = true;
                        <span class="keyword">end</span>
                    <span class="keyword">else</span>
                        <span class="comment">% Create new particle-particle interaction if needed</span>
                        this.createInteractPP(drv,p1,p2,true);
              