Bollywood star Amitabh Bachhan today announced that his twitter account has been hacked. He filed a complaint with the Mumbai Police against the dirty, abusive SMS that he has been receiving for the past one year. <br/><br/>In his letter addressed to the senior Police Inspector of Juhu police station, the actor requested him to investigate the matter and take action against the perpetrators. He also attached photocopies of his mobile screen containing the content.