Accusing the ruling National Democratic Alliance (NDA) of not following the convention of giving Lok Sabha Deputy Speaker's position to the Opposition, the INDIA bloc on Tuesday fielded Congress leader K Suresh as its candidate for the Lok Sabha Speaker's position against Om Birla, reported news agency PTI.

Congress leader K C Venugopal and DMK's T R Baalu walked out of Defence Minister Rajnath Singh's office, refusing to endorse NDA candidate Om Birla without being offered the Deputy Speaker's position, reported PTI.