Question

A charge particle A moves towards +y axis has a charge q and velocity V. another charge particle B moves towards -x axis has charge q and velocity 2V. when A is at (0,0) and B is at (r,0) we calculate magnetic force due to one on another as on A due to B is 0 and ob B due to A is non zero. how can it be true.is that it does not follow action reaction law?