  We analyze topological objects in pure QCD in the presence of external quarks
by calculating the distributions of instanton and monopole densities around
static color sources. We find a suppression of the densities close to external
sources and the formation of a flux tube between a static quark--antiquark
pair. The similarity in the behavior of instantons and monopoles around static
sources might be due to a local correlation between these topological objects.
On an $8^{3} \times 4$ lattice at $\beta=5.6$, it turns out that topological
quantities are correlated approximately two lattice spacings.
