The Sion police have arrested the teacher who allegedly thrashed a Std VII student black and blue with a cane for not completing her maths homework. The teacher, identified as Pawan Shukla, allegedly regularly beats up students over petty issues.

The 14-year-old girl lives with her widowed mother and two siblings in Dharavi. She attends a Hindi medium school in Sion from 7 am till 1 pm and later goes to a daycare centre in Sion. "As I work in a factory, I keep my children at a shelter home run by an NGO, Happy Feet Home," the mother said.