NEW DELHI: The Election Commission on Sunday announced by-elections to eight assembly constituencies across six states — Goa, Gujarat, Karnataka, Maharashtra, Nagaland and Tripura.Announcing the schedule during the press conference held in New Delhi, chief election commissioner Gyanesh Kumar said polling for the assembly constituencies in Goa, Karnataka, Nagaland and Tripura will be held on April 9, while polling in the constituencies in Gujarat and Maharashtra will take place on April 23.The Election Commission said the counting of votes for all eight bypolls will be held on May 4, the same day results will be declared for assembly elections being conducted in other four states of West Bengal, Assam, Kerala, Tamil Nadu and the Union Territory Puducherry.Bye-elections are conducted to fill legislative seats that fall vacant before the completion of a term. Such vacancies may arise due to reasons including resignation, disqualification or the death of a sitting legislator.The upcoming bypolls will determine new representatives for these constituencies and restore their full representation in the respective state assemblies.