A worker was taken to Harborview with serious injuries after an explosion at the construction site for the 230 Broadway development Tuesday afternoon.

Seattle Fire Department reports being called to the scene at 2:42 p.m., where medics treated a male in his 40s with burns on his arms, legs and face.

Medics transported the man to Harborview Medical Center. At the scene, a witness said people at the site indicated the explosion may have been caused by misidentification of a container of alcohol.

We’ll check for more details on the cause as information becomes available.

UPDATE 8/1: The local Seattle Labor & Industries branch is currently investigating the case to determine the cause of the explosion.