  In this Monte Carlo study we concentrated on the influence of non-magnetic
impurities arranged as the lines with random orientation on
paramagnetic-to-ferromagnetic phase transition in the 3D Ising model. Special
emphasize is given to the long-distance decay of the impurity-impurity pair
correlation function. It is shown that for the lattice sizes considered
(L=10-96) and for the two different impurity distributions (purely random and
mutually avoiding lines) the function is governed by the power law of 1/r^a
with an universal exponent a \simeq 2. This result supports our findings about
the numerical values of the critical exponents governing magnetic phase
transition in the 3D Ising model with long-range-correlated disorder.
