Mizoram Governor Kummanam Rajasekharan Monday accepted the resignation of state Home Minister R Lalzirliana.
Lazirliana, who is also the state Congress unit vice president, was earlier expelled from the primary membership of the party.
The development comes ahead of the state assembly election due later this year.
Lalzirliana, a member of the Lal Thanhawla-led ministry, held the portfolios of home, rural development, power, excise and narcotics.
He had submitted his resignation from the council of ministers on Friday after he was served a show cause notice by the party's Disciplinary Action Committee (DAC).
Chief Minister Lal Thanhawla had earlier referred Lalzirliana's resignation letter to the Governor.
According to a notification issued by Mizoram Chief Secretary Arvind Ray, the governor accepted the resignation on the advice of the chief minister.
Lalzirliana's portfolios were allotted to the chief minister, another notification said.
The decision to expel Lalzirliana was taken at an emergency meeting jointly held by the Political Affairs Committee (PAC) and DAC on Sunday at the official residence of Thanhawla, who is also the state party unit chief.
The expulsion order was issued by C Lalpianthanga, chairman of the DAC, who said Lalzirliana had refused to explain his actions even after being showcaused.
The show cause notice was served to Lalzirliana on Tuesday last giving him time till 3 pm on Friday to explain his alleged ties with the opposition Mizo National Front (MNF) party.
He has, however, given the reason for his resignation as failure to create a separate Saitual district comprising areas in the eastern part of Aizawl, including Tawi assembly constituency, his home turf, during the last ten years of Congress rule in the state. He has been elected from the constituency since 1998 for four consecutive terms.
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