Authorities have identified 11 people killed in an implosion at a paper manufacturing facility in Washington last week.

The total death toll is 11, including three who are still missing. It’s one of the deadliest U.S. workplace accidents in recent decades.

The tank ruptured Tuesday at Nippon Dynawave Packaging Co. facility in Longview, a city located along the southern Washington border with Oregon, killing 11 people.