Seven people were injured in a chemical plant fire in east China''s Zhejiang Province, local news sources said Monday. The fire engulfed a three-story New Oriental chemical plant in the province''s city of Taizhou at approximately on Monday morning after an explosion took place inside the plant, China''s (Xinhua) News Agency reported. Seven people were injured, with four in serious condition. They are now being treated at a local hospital. The fire was put out and the cause of the explosion is under investigation.