Yesterday, 26-year-old Birla had lodged a complaint at Mangolpuri police station stating that someone from crowd threw a stone at her windshield while she was returning after attending a function at the Santoshi Mata Mandir at 6.15 PM.
The windscreen of Birla's car was hit by a cricket ball as a group of boys was playing cricket in the area, a police official said.
The incident reportedly happened in R-Block Mangolpuri, which falls in constituency of the Women and Child Development Minister.
"When the incident had happened, some of us who were also inside the car got down and asked the crowd which had gathered but nobody came forward. Now it's said that it was cricket ball. It all seems to be a conspiracy," the minister's aide said.
However, immediately after the incident Birla had reiterated that she will not take any police protection and was "undeterred" by the attack.
In keeping with AAP's promise on austerity, Chief Minister Arvind Kejriwal has refused to take any security with all of his six ministers saying they would follow in their leader's footsteps in that regard.