This was second such incident of child drowning in an open drain within two days, they said.
On Sunday evening, an 8-year-old boy of Gulzar colony also drowned in the same drain. It was constructed for the purpose of draining out rainy water and sewerage purpose.
Aiyyan was playing with his elder brother near the drain today when he slipped into the drain which is around 8-feet-deep.
His brother reached home and narrated the whole incident by indications because he is born mute, Deputy Superintendent of police Manisha Singh said.