Three people have died and at least eight were injured after a massive landslide in rural Washington state destroyed six houses.

Read more below, via FoxNews.com:

Three people died in a massive mudslide in Washington state on Saturday, and others were injured, the Snohomish County sheriff's office reported.

Sheriff's spokeswoman Bronlea Mishler says three died after an estimated mile-long slide carried a house with people inside across a rural road north of Seattle just before 11 a.m. Saturday.

Eight people injured in the Snohomish County landslide have been brought to a nearby hospital for treatment, said spokeswoman Jennifer Egger of Cascade Valley Hospital in Arlington.

It's unclear if the dead are among those injured, or if any of those people were inside the house that was swept away.

Cascade Valley Hospital was expecting more injured people, but Egger said she didn't know how many and couldn't comment on the condition of those already at the hospital because they were still being evaluated.

The American Red Cross has set up at the hospital and is seeking donations of food, water, blankets and clothing, Egger said.

The Daily Herald reported that as of 1 p.m., officials were moving rescuers back from the scene, citing concerns of the North Fork Stillaguamish River rising because of the mudslide.

"Initial reports were that a house was stuck in the slide, and someone was calling for help inside," Trooper Mark Francis said.

Search-and-rescue operations are underway by Snohomish County crews and the Washington State Patrol.

The Washington Department of Transportation says mud, trees and building materials are blocking both directions of State Route 530 near the town of Oso, about 55 miles north of Seattle.

Heavy rain over this past week likely contributed to the mudslide. Saturday's weather was sunny and clear.

Spokesman Bart Treece of the Washington State Department of Transportation said he doesn't know how long the two-lane rural road will be closed. Drivers are advised to find another way to get between Darrington and Arlington, he said.

"We're standing by ready to help out where we can," Treece said.