A chemical spill at a Carson, California company last night caused eye, nose and throat irritation among dozens of employees.

News sources are reporting that a sulfuric acid spill around 9 p.m. at a chemical company affected approximately 70 people working there and at nearby businesses. Sixty of them were treated at the scene, while ten were transported to a hospital for treatment.

Symptoms included difficulty breathing, coughing, nausea and aching throats. CBS Los Angeles reported that workers at Brookville Industries said their noses and throats felt as if they were on fire.

Hazmat and law enforcement officers responded to the scene. An investigation into the cause of the spill is underway.