GUWAHATI: Rescue teams fanned out over remote eastern Bhutan Tuesday to assess damage and look for trapped survivors as the death toll from a strong earthquake rose to 11.

The 6.1-magnitude quake that struck early afternoon on Monday triggered landslides, damaged buildings including Buddhist monasteries, and sent rocks tumbling down steep mountain slopes.

"The death count is now 11 and several others are injured," U. Tenzing, an official at Bhutan's disaster management department, told AFP by telephone on Tuesday, explaining that an injured victim had died overnight.

"Rescue teams are working overtime to assess the damage and look for people trapped or injured," the Bhutanese official said from the capital Thimphu.

Three Indians were among those killed when they were hit by falling boulders in the eastern district of Samdrup Jongkhar, while eight other people died in building collapses, Tenzing said.

Landslides and boulders blocked roads to remote, hilly regions in the worst-affected east of the country where communication and power networks were disrupted.

"Some of the monasteries were damaged and monks and other people simply fled the worship places out of fear," T. Dorji, a resident and local businessman in Trashigang district in eastern Bhutan, told AFP by telephone.

The tremors from Monday's quake were felt in northeastern India and residents were given another fright early Tuesday when a quake in neighbouring Myanmar rippled through the region.

The moderate 5.6-magnitude earthquake jolted Myanmar at 2:08 am (1938 GMT Monday), centred 427 kilometres (265 miles) north-northwest of Yangon at a depth of 82 kilometres, the US Geological Survey (USGS) said.

"There are no immediate reports of any damage to lives or properties in Tuesday's earthquake, although people panicked and ran out of their homes," a government disaster management official in Assam state said, requesting not to be named.

The eastern Himalayan area is prone to earthquakes. Tuesday's was the sixth since August 11 to have hit India's northeast.

The tremors were felt in the northeastern Indian states of Assam, Arunachal Pradesh, Nagaland, and Manipur, besides Myanmar.