A powerful explosion occurred at a Tacoma apartment building while firefighters were investigating reports of smoke. The blast prompted a large emergency response, with multiple fire crews dispatched to the scene. Details regarding the cause of the explosion remain unclear, and an investigation is underway to determine the source of both the initial smoke and the subsequent blast. Authorities are currently assessing the extent of the damage to the building and surrounding areas. No immediate reports of injuries were available, but emergency medical personnel were on standby. The incident has led to road closures and evacuations in the vicinity of the apartment complex as firefighters continue their work.