Two siblings drowned in a pond at Barpara village in Jashore's Monirampur upazila on Saturday.
The deceased were identified as Samia, 4, and Sabid, 3, daughter and son of Shahidul Islam Master of the village.
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The two kids went missing when they were playing near the water body on Saturday morning, said ABM Mehedi Masud, officer-in-charge (OC) of Monirampur Police Station.
Later their family members, along with local people, searched for them.
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Around 2 pm, they rescued the kids and took them to a nearby health centre where the doctor pronounced them dead, he added.