  A geometric definition of news tensor on null hypersurfaces in four
space-time dimensions is presented. When the conformal Einstein field equations
hold, this news tensor yields the correct expression for the radiative
components of the rescaled Weyl tensor at infinity with vanishing cosmological
constant in arbitrary conformal gauge. Also, a generalised transport equation
for the Geroch tensor is derived. Important differences between null
hypersurfaces in the bulk of the space-time and null infinity with vanishing
cosmological constant are reviewed, and their impact on the role of the news is
discussed.
