The military and other authorities have started rescue operations in the region, the authorities said.

While both neighbors have been affected by the flood, many Bangladeshis blamed India for the flash floods, saying that India opened a river dam in Tripura, causing sudden floods in Bangladesh. India’s Ministry of External Affairs denied that in a statement.

Monsoon rains in South Asian nations India and Bangladesh typically begin in June. India and Bangladesh share 54 common rivers that flow from the Himalayas to the Bay of Bengal. The countries have contention over the sharing of waters of the common rivers.

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Associated Press writer Wasbir Hussain contributed to this report from Guwahati, India.