Congress leader Karti Chidambaram has written to Lok Sabha Speaker Om Birla, alleging that his privileges and rights as a parliamentarian were breached by the Central Bureau of Investigation (CBI) when they confiscated work documents during a raid last week. "I have become the victim of a grossly illegal and patently unconstitutional action. The Central Bureau of Investigation, in the garb of conducting an investigation into an 11-year-old decision of the Government of India in which I have absolutely no involvement, raided my residence in Delhi," he wrote in the letter to Om Birla.