A boiler explosion at a garment factory in Bangladesh owned by export-oriented Multifabs Ltd. has killed 10 people and injured 50, officials said Tuesday. Local police chief Aminul Islam said the explosion took place on Monday evening at Kashimpur area in Gazipur district, outside the capital, Dhaka. By Tuesday afternoon, 10 deaths had been reported. Islam said the search for more victims was ongoing. It was not clear how many remained missing. According to relatives, some six people were missing. The injured were being treated at hospitals, Islam said. It was not immediately clear what caused the explosion. Authorities have ordered an investigation. Relatives waited outside the four-story building Tuesday for news on their loved ones as firefighters searched for victims. According to the company's website, it produces about 140,000 pieces of knitted apparel a day for export.