Twitter Inc said on Thursday it was worried about the safety of its staff in India, days after Delhi Police personnel visited its offices in south Delhi and Gurugram to "serve notice" in connection with their probe into the controversial 'toolkit' case. A Twitter spokesperson said that they are concerned by recent events regarding their employees in India and the potential threat to freedom of expression for the people they serve. Without directly referring to the Delhi police action, Twitter said they have concerns with regards to the use of intimidation tactics by the police in response to enforcement of their global terms of service.