An earthquake measuring 6.7 magnitude hit northeast India near its border with Myanmar and Bangladesh early Monday, the U.S. Geological Survey (USGS) confirmed. There was no immediate word on casualties.

The quake struck at 4:35 a.m. local time (6:05 p.m. ET on Sunday), about 20 miles northwest of Imphal, the capital of Manipur state.

Strong tremors were felt across the region, the BBC reported. Witness accounts reported a quake that was unlike anything they had felt before, NBC News reported, with residents awakened by shouting relatives and an intense shaking that lasted from 35 seconds to two minutes.

Nearly 200 miles south of the quake’s epicenter, in Siaha, India, one account described a building that sounded as if it was crumbling, NBC reported.

In Imphal, there were initial reports of damage to a popular market, The Associated Press reported. The tremor left large cracks in several walls and a portion of the building collapsed, police said.

India’s Meteorological Department said the epicenter of the quake was in Tamenglong region of Manipur state. It struck at a depth of 17 kilometers (about 10 miles) in the India-Myanmar border region. USGS said the depth was 55 kilometers (about 34 miles).

People panicked and rushed out of their homes in Gauhati, the capital of neighboring Assam state, as they felt massive shaking at least twice within 60 seconds, AP reported.

In Imphal, residents said furniture was knocked over and books fell off shelves, but no major damage was initially reported.

“The ground swayed for almost a minute, jolting people awake in their homes,” said one resident, Apem Arthur. The area is dotted with small houses. There are few tall buildings in the region, she said.

The tremors were also felt in Kolkata, the capital of West Bengal state.

USGS initially reported a 6.8 magnitude before revising the assessment to 6.7 about an hour later.

Contributing: The Associated Press