A 6.7 magnitude Manipur earthquake has rattled the country in the dawn, prompting thousands of panic-stricken people to rush out into the streets from their homes.
The quake struck at 5:05am Monday.
The US Geological Survey (USGS) initially reported the earthquake's magnitude at 6.8, but later revised its strength.
According to the USGS, the epicentre of the tremor was monitored at 351km east-northeast of Dhaka and 33km northwest of Imphal, the capital of India's Manipur state.
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The USGS said the quake was 57 kms (35 miles) deep, and initially reported it had struck inside Myanmar.
There was no immediate information on casualties or damage.
Strong tremors have been felt across the region, reports BBC.
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The BBC's Salman Saeed in Dhaka says many people were seen fleeing their homes in Bangladesh.
The US Geological Survey estimated that as many as 98m people in the region may have felt the earthquake.
The region has a history of powerful earthquakes caused by the northward collision of the Indian and Eurasian plates. They are moving towards each other at a rate of 4-5cm per year.
In 2005, a magnitude 7.6 quake in Pakistan-administered Kashmir left more than 75,000 people dead.
In April 2015, Nepal suffered its worst earthquake on record with 9,000 people killed and about 900,000 homes damaged or destroyed.
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