This file photo taken on March 17, 2011 shows a sign warning visitors of searches for prohibited materials as they near the Hanford nuclear site in Hanford, Washington. AFP / Shaun Tandon
Los Angeles: Hundreds of workers at a nuclear site in the US state of Washington were ordered to take cover on Tuesday after a tunnel filled with contaminated material collapsed near the facility, federal officials said.
Employees at the Hanford Site plant, located about 170 miles (275 kilometers) southeast of downtown Seattle, were sent an alert by management in early morning telling them to "secure ventilation" and refrain from "eating or drinking."
