A nine-year-old boy drowned in the Vasai Virar City Municipal Corporation's (VVCMC) swimming pool on Sunday evening. The Manickpur police have arrested four people, including training guards, for negligence.

Yug Sanjay Ladwa, a resident of Vasant Nagari in Vasai, had gone to the VVCMC swimming pool with his parents. Two hours later, all the children had got out of the pool and gone to their parents, who were waiting outside.