  Branes are embedded surfaces in a given background (bulk) spacetime. Assuming
a warped bulk, we investigate, in analogy with the case for geodesics, the
notion of {\em focusing} of families of such embedded, extremal 3--branes in a
five dimensional background . The essential tool behind our analysis, is the
well-known generalised Raychaudhuri equations for surface congruences. In
particular, we find explicit solutions of these equations, which seem to show
that families of 3--branes can focus along lower dimensional submanifolds
depending on where the initial expansions are specified. We conclude with
comments on the results obtained and possibilities about future work along
similar lines.
