Toyota said on Monday more than 50 employees were injured after two giant explosions last week in the Chinese city of Tianjin, where the carmaker's factory lines will remain closed until at least the end of tomorrow. Production at Toyota's Tianjin subsidiary - including a factory line 70 kilometers away that depends on parts from the main operation - was halted due to evacuations from the city, Toyota said. When the accident happened, Toyota's operations had been shut for a week for a summer vacation, with production due to restart Sunday, so there was no immediate impact on production from the disaster. The main Tianjin factory, which produces several models including the Corolla and Vios sedans, employs around 12,000 and manufactured 440,000 vehicles last year.The deadly blast also damaged a pair of Toyota dealerships that required them to temporarily close, while some other Japanese firms, including consumer electronics giant Panasonic and carmaker Mazda, reported minor damage at their operations in Tianjin. Panasonic said there was minor damage to its plant in the industrial city and that it halted operations yesterday for safety checks. Massive explosions at a chemical storage facility killed more than 100 people and injured more than 700, with firefighters still battling the giant blaze that followed. The accident has also raised fears about toxic chemicals poisoning the air, particularly sodium cyanide. The industrial zone of Tianjin, one of China's biggest cities with a population of 15 million people, hosts car plants, aircraft assembly lines, oil refineries and other service and production facilities.