The chief executive of Infosys, Vishal Sikka, has resigned from his post with an unconventional and lengthy letter blaming "personal attacks". In the letter Mr Sikka said the "continuous drumbeat of distractions" contributed to his decision to resign. It follows public criticism of the company and its board by its founders. Infosys is one of India's largest IT services firms. Shares in the firm plunged 9% following news of Mr Sikka's departure. Mr Sikka was appointed in June 2014 and tasked with turning around the struggling business. The company announced he was resigning as chief executive and managing director with immediate effect, but would stay on as executive vice chairman.

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