Coal gate scam probe reaches PMO

India News: The CBI is all set to quiz the top guns of the Prime Minister's Office in its coal gate scam probe. Highly-placed sources confirmed that those likely to face questioning include TKA Nair, who was principal secretary to Prime Minister Manmohan Singh in 2009, when he also handled the coal portfolio. Also in the CBI's sights are the then joint secretary Javed Usmani, now the Chief Secretary of Uttar Pradesh, former director in the PMO Vini Mahajan, who is now Principal Secretary (Health) in the Punjab government, and former coal secretary C. Balakrishnan.