EY told Business Insider it has taken "appropriate disciplinary action" against some staff.TOLGA AKMEN / Contributor / GettyEY has fired dozens of staff in the US over code of conduct breaches, the FT first reported.The staff watched multiple online training courses simultaneously, the report said.EY confirmed to Business Insider it has taken "appropriate disciplinary action" against some employees.The accounting and consultancy giant EY has fired dozens of US staff, accusing them of breaching internal ethics codes, the Financial Times reported.The dismissals took place last week after an investigation found that the staff had watched multiple online training courses simultaneously during "EY Ignite Learning Week" in May, the FT reported.EY said in a statement shared with Business Insider that a number of employees had violated the company's global code of conduct."At EY, our core values of integrity and ethics are at the forefront of everything we do.