  The recent discovery of superconductivity in infinite-layer nickelates
generates tremendous research endeavors, but the ground state of their parent
compounds is still under debate. Here, we report experimental evidences for the
dominant role of Kondo scattering in the underdoped Nd1-xSrxNiO2 thin films. A
resistivity minimum associated with logarithmic temperature dependence in both
longitudinal and Hall resistivities are observed in the underdoped Nd1-xSrxNiO2
samples before the superconducting transition. A linear scaling behavior
$\sigma_{xy}^{AHE}\sim\sigma_{xx}$ between anomalous Hall conductivity
$\sigma_{xy}^{AHE}$ and conductivity $\sigma_{xx}$ is revealed, verifying the
dominant Kondo scattering at low temperature. The effect of weak
(anti-)localization is found to be secondary. Our experiments can help
clarifying the basic physics in the underdoped Nd1-xSrxNiO2 infinite-layer thin
films.
