Shiv Sena chief Uddhav Thackeray on 31 May asked opposition parties to "unitedly boycott" elections if controversies surrounding electronic voting machines are not resolved quickly.
He also threatened to drag the Election Commission to court over the Palghar bypoll result and sought suspension of election officers over the "sudden increase" in voting percentage there.
The Election Commission had earlier rejected allegations levelled by the Shiv Sena that irregularities in electronic voting machines led to the defeat of its candidate in the Palghar Lok Sabha bypoll, saying that the winning BJP candidate has been issued a certificate.

