Along with Narayanasamy, five Congress legislators will be sworn-in as ministers.
They include A Namassivayam, Malladi Krishna Rao, Shah Jahan, M Kandasamy and R Kamalakannan (all are former ministers), Assistant Director of Information and Publicity I.Ganapathy said.
Lt Governor Kiran Bedi will administer the oath of office and secrecy to the six-member team of ministers at 'Gandhi Thidal' near the sea shore at 12.10 pm, Ganapathy said.
69-year-old Narayanasamy, who had served as Minister of State in the Prime Minister's Office in the second UPA government after serving as MoS Parliamentary Affairs in UPA-I, did not contest the May 16 Assembly polls and will now have to seek election to the legislature in a bypoll.
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Raj Nivas sources told PTI that the Lt Governor had invited Narayanasamy to form the government. The Union Home Ministry had since approved Narayanasamy's letter staking claim to form government.
Narayanasamy had also submitted to Bedi the names of the Congress legislators to be his cabinet colleagues.
He was elected leader of the 15-member Congress Legislature party on May 28. The party also has support of the two-member DMK in the 30-member Assembly.
The two were camping in Delhi after the poll results were announced holding talks with the party high command, and there was delay in ministry formation because of the tussle.
(REOPENS MDS 2)
Meanwhile, DMK lauded Narayanasamy for his "genuine work" and expressed confidence that the Congress government will usher in growth and development for the people of the Union Territory.
DMK President M Karunanidhi wished Narayanasamy and his minister-designates, and deputed his son and party Treasurer MK Stalin to participate in the swearing-in ceremony of the Congress government tomorrow.