  We construct two classes of exact solutions to six and higher dimensional
Einstein-Maxwell theory in which the metric functions can be written as
convolution-like integrals of two special functions. The solutions are regular
everywhere and show a bolt structure on a single point in any dimensionality.
Moreover, we find the exact nonstationary solutions to the Einstein-Maxwell
theory with positive cosmological constant. We show that the cosmological
solutions are expanding patches in asymptotically de Sitter spacetime.
