Niles Canyon Road closes again due to fallen boulders

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Niles Canyon Road in unincorporated Alameda County, closed earlier by a mudslide, was blocked again Monday afternoon after large boulders fell in the roadway, authorities said.

Caltrans is bringing heavy equipment to clear the large rocks from  the road, which is also known as State Route 84, Fremont police said.

No collisions or injuries resulted from the falling rocks, said police spokeswoman Geneva Bosques. Motorists should use caution driving on the road during the wet weather season, she said.

The road is closed between Fremont and Sunol. There is no estimated time for reopening the roadway.

A mudslide closed the road about 3:05 a.m. just east of Palomares Road, and caused at least one traffic collision. The road reopened just before 6:20 a.m., according to the California Highway Patrol.

Alternate routes are Interstate 680 and Mission Boulevard to interstate highways 238 and 580.