Kuppammal (62) of Seeranaickenpalayam, died at Coimbatore Medical College Hospital after she was hit by a motorcycle, while walking along the Maruthamalai Road on Saturday.
The police have registered a case against the rider Kavitha (22) and further investigation is on.
In another incident, Kanagaraj (26) of Annur died on the spot after the motorcycle he was riding was knocked down by a lorry, on Kalapatty Road on Saturday.
The police have registered a case and arrested Tirumalai (42) of Arur.
Pramod Dev (24), a labourer who was working at a flour mill on Mettupalayam Road, was crushed to death under the wheels of a van on Saturday.
Police sources in Coimbatore said that the incident took place when Pramod was sleeping outside the mill premises covered with a coir blanket and the van driver Muthupandy failed to notice him sleeping, while the vehicle was reversing.
The police registered a case and arrested Muthupandy. Further investigation is on.