Congress Legislature Party (CLP) leader in Mizoram Assembly Zodintluanga Ralte tested positive for COVID-19, officials said on Tuesday.
59-year-old Ralte, the MLA from Thorang, was found infected with the deadly virus on Monday, they said.
He has developed mild symptoms and is in home isolation, they said.
Mizoram on Monday reported 165 new COVID-19 cases, 414 less than the previous, with the tally increasing to 1, 21,524.
579 cases were reported on the previous day (Sunday). The death toll rose to 433 as two more people have succumbed to the infection in the last 24 hours.
The single-day positivity rate dipped to 7.49 per cent from 9.74 per cent on the previous day.