NEW DELHI, India (CNN) -- The death toll from Monday's 6.1-magnitude earthquake in Bhutan rose to 11, the country's home minister said Tuesday.
Among the dead were four Indian road laborers who were crushed when boulders from hillsides rained down on them, said Home Minister Minjur Dorji.
"In all, we have lost 11 lives," the minister said, adding that the government estimated that the temblor caused millions of dollars in damage.
Almost all homes and infrastructure in the quake-stricken eastern parts of the Asian kingdom were hit, Dorji said.
Several schoolchildren and monks were treated for injuries. But the total number of injured wasn't available yet, according to the minister.
"Some of them (rescuers) are on their way. We should be able to give the figure (of those injured) by tomorrow," Dorji said.
The quake was initially registered at 6.3 magnitude, but the U.S. Geological Survey -- which measures earthquakes around the world -- later revised the magnitude to 6.1.
A number of monasteries and dzongs -- Bhutanese forts -- were damaged.
Those injured included two monks who had been trapped in a collapsed monastery in Bhutan's eastern Tashigang district, Dorji said.
The quake also was felt in India's northeastern Assam state, bordering Bhutan.
It struck about 2:50 p.m. (0850 GMT) Monday and its epicenter was 180 kilometers (110 miles) east of Bhutan's capital, Thimphu, and 135 kilometers (85 miles) northwest of Guwahati, in Assam state, according to the U.S. Geological Survey.
Bhutan -- a small, landlocked country in the Himalaya mountains -- is considered one of the world's most isolated countries because of the government's strict regulation of foreign influences.