  The transport and magnetic properties of the tetragonal Fe$_{1+\delta}$S were
investigated using magnetoresistivity and magnetization within 2$\leq T\leq
$300 K, $H\leq$70 kOe and $P\leq$ 3.0 GPa. In addition, room-temperature X-ray
diffraction and photoelectron spectroscopy were also applied. In contrast to
previously reported nonmetallic character, Fe$_{1+\delta}$S is intrinsically
metallic but due to a presence of a weak localization such metallic character
is not exhibited below room temperature. An applied pressure reduces strongly
this additional resistive contribution and as such enhances the temperature
range of the metallic character which, for $\sim$3 GPa, is evident down to 75
K. The absence of superconductivity as well as the mechanism behind the weak
localization will be discussed.
