An explosion Thursday at the hazardous waste incinerator in East Liverpool had emergency crews from around the area rushing to the scene. The explosion happened shortly after one oclock in the afternoon. A spokesperson for the Von Roll WTI plant says the explosion happened on the south side of the facility. A spokesperson for the company says the explosion happened where the hazardous chemicals are moved from the drum to the kiln. The explosion blew part of the building wall off which hit and injured an employee. Emergency officials say the employee suffered a cut on his leg and burns to his body. The victim was taken by helicopter to Mercy Hospital in Pittsburgh. Emergency officials say the employee did not have life threatening injuries. The spokesman for the company says two more employees were taken to East Liverpool Hospital for evaluation. Both emergency personnel and the company say at no point were people who live near the plant in danger. The chemicals involved with todays explosion are chemicals that are used in the manufacturing of plastic. What caused the chemicals to ignite is still under investigation.