Colorado: blocks the size of a building affect the American road

A stretch of road in the US state of Colorado was totally destroyed by two blocks "the size of a building," officials said.

The road was hit by a landslide "composed of earth, rock and two huge rocks," said the Colorado Department of Transportation.

The photos posted on his Facebook page show a trench 2.5 m deep left by the rocks.

The road between the cities of Cortez and Telluride is closed for an indefinite period.

It is estimated that the heavier block weighs nearly 4,000 tonnes and is 15 feet in height and width.

Work is underway to remove rock debris to prevent further slips, the department said.

Both blocks must be drilled and sanded. It is not known yet when the road will reopen.