Thane: A 65-year-old man from Mafatlal Zopadpatti slums of Kalwa who allegedly indulged in unnatural sex with a three year old girl was arrested by the Kalwa police on Tuesday evening, police sources said here today.

Police sub-inspector D D Randive of the Kalwa police station told PTI that the girl also lived in the same locality as the accused and they were neighbours.