The US National Labor Relations Board has officially commenced a new three-month investigation into Google’s labor practices, an agency spokesperson confirmed to CNBC. It will include whether Google violated labor laws when it recently fired four employees, and also look at whether Google discouraged employees from engaging in union activity. The workers in a Medium blog post stated they participated in legally protected labor organizing actions, including “demanding Google improve its treatment of our temp, vendor, and contractor colleagues (‘TVCs’)” and supporting TVC colleagues in Pittsburgh through the process of successfully forming a union earlier this year.