The death toll from a chemical spill at a paper plant in Washington state has risen to 11 as rescuers recovered the bodies of all nine missing people, the U.S. authorities said on Saturday (May 30, 2026).

Also read | At least 1 dead, 9 others missing in chemical tank implosion at Washington State mill

A huge tank holding tens of thousands of gallons of a highly caustic substance imploded on Tuesday (May 26, 2026) at the plant in Longview, Washington state, sparking a major search operation.

“We have recovered the ninth and final missing employee of this incident,” Brad Hannig, Fire Chief of Longview Fire Department, told a news conference.

Rescuers said on Wednesday (May 27, 2026) that two people had died while nine others remained missing.

The accident at the Nippon Dynawave Packaging Company happened during an early morning shift change when a 9,00,000 gallon (3.4 million litre) tank containing a large quantity of a substance called white liquor ruptured.

White liquor is a highly alkaline solution containing sodium hydroxide and sodium sulfide that is used to break down wood chips and create the pulp from which paper is made.

Nippon Dynawave Packaging, which is a subsidiary of Japan's Nippon Paper Group, says on its website that it produces eight billion single-serve containers every year, supplying customers in North America, Asia, and around the world.