Three boys, all aged 16, drowned in the sea near the Marina beach in Chennai when a giant wave pulled them in on Wednesday evening, police said.
The bodies washed ashore on Thursday, police said.
In the other case, two boys drowned in a lake at a village near Anthiyur in Erode district on Thursday.
In Nagapattinam district, two boys, aged three and four, drowned in a pond being dug under the National Rural Employment Guarantee Scheme at a village near Vedaranyam in the district on Wednesday evening, police said.
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