Investigators probing the AgustaWestland chopper deal are likely to question former Prime Minister, Dr Manmohan Singh and others. The CBI says that it would like to seek some clarifications from Dr Singh. Earlier, former Air Chief, S P Tyagi had told a court that the then Prime Minister's Office was in the know of changes in specifications for the purchase of the VVIP choppers.<br /><br />----------------------------------------------------------------------------------------------------------<br />Subscribe to OneIndia News Channel for latest updates on movies and related videos.<br /><br />You Tube: https://www.youtube.com/channel/UCqTa3sNT6SfiQ2DQK_kuWlA<br /><br />Follow us on Twitter : https://twitter.com/Oneindia<br /><br />Like us on Facebook : https://www.facebook.com/oneindianews<br /><br />Join our circle in Google Plus : https://plus.google.com/u/0/b/112448479869362930381/+oneindia<br /><br />Download App: https://play.google.com/store/apps/details?id=in.oneindia.android.tamilapp