AlQa'dah 1, 1433, Sep 17, 2012, SPA -- An explosion at a cleaning supply factory in Azerbaijan has injured at least five people, government officials said on Monday. However, media reports in the authoritarian state said that six people were killed at the site in Sumgait, about 25 kilometres north-west of the capital Baku. According to dpa, ten of the 12 tanks that store chemicals and fuel at the factory exploded for unknown reasons, contact.az reported.