A massive cyclone has wreaked havoc on Myanmar, and the country's pro-democracy group says hundreds of people are feared dead.

Cyclone Mocha made landfall on Sunday in Myanmar's western state of Rakhine. Violent winds and heavy rains destroyed buildings and homes.

The country's state-run media say military chief Min Aung Hlaing visited the area on Monday. But the outlets have not disclosed the extent of the damage.

The pro-democracy National Unity Government says at least 435 people have died in Rakhine and other areas.

NHK has obtained footage showing heavy damage to a fishing village in Rakhine State. About 2,700 Rohingya Muslims live there. They have been facing persecution since a military crackdown in 2017 and are displaced within the country.

The video shows a concrete bridge over a river in the village broken in two. A resident of the area says there has been widespread destruction.

"There were 600 houses here, and 90 percent of them have been completely destroyed. Five women and three men in our village are dead," he said.

The cyclone also battered central parts of Myanmar. International organizations and aid groups have struggled to access the areas, as fighting there has intensified between the junta and ethnic-minority militants backing Myanmar's pro-democracy forces.