The deceased worked for World Network Service (WNS), a business process management (BPM) firm in Vizag city.
A total of 10 people had come to the spot on bikes and three of them ventured into the waters around 3 pm. They immediately drowned in the canal, said V Madugula police station officials under whose jurisdiction the area falls.
The deceased were identified A Dileep Kumar (26), resident of Pedagantyada area in Vizag, M Nani (28), native of Sunkarametta area under Arakuvalley mandal and M Datta (26), native of Pune.
It took around one hour for the police and locals to fish out their bodies from the reservoir.
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The police have registered a case of unnatural death and bodies have been sent for autopsy.
In another incident in Vizag city, a second year B Sc student of a private college identified as BR Srikar (19) was swept away by the strong current while swimming on the RK Beach along with his friends.
The police have launched a search operation to trace him.