President Pranab Mukherjee has expressed deep concern over attacks on African nationals in Delhi. Speaking at a function in New Delhi, Mr. Mukherjee said it is not tolerable and wondered why Africans are feeling unsafe in India. <br/><br/>He said Mahatma Gandhi made his experiment of satyagraha on African soil to transform India and the nation always considers its relationship with African countries very close. He also appreciated government's action over the issue expressing satisfaction over the prompt action.