Residents reported that the explosions caused their homes to shake and could be heard from miles away.

A shelter-in-place order was issued for Logan Township in Gloucester County after a massive explosion at Savita Naturals on Heron Drive, driving residents within a two-mile radius to stay indoors.

A press briefing was planned for around 5:30 p.m. local time to provide updates on the incident and potential causes.

Emergency crews from Camden County joined Gloucester County responders, as on-scene efforts continued with fire, hazmat units and rescue personnel addressing the incident.

The blast, reported Wednesday afternoon, caused a partial building collapse at the Savita Naturals facility and sent burn injuries to several people, with four hospitalizations confirmed to-date.

Witnesses reported a large black smoke plume and ongoing flames, with authorities noting burn victims and the area filling with smoke as responders worked.

Initial information on injuries and causes remained unclear, with officials not yet releasing full details about the explosion.

Several people were injured in the blast, and the full extent of injuries had not been determined at the time of reporting.

Officials had not disclosed the explosion’s exact cause or the condition of the four victims.

Officials described the situation as ongoing, prioritizing injuries and safety precautions while investigators begin to assess the root cause and long-term impacts.

Investigators noted that efforts to obtain more information were hindered as personnel with details remained at the scene.

Video footage showed a large plume of black smoke and responders battling flames, with witnesses feeling the blast across the area.