Nagaland's Chief Electoral Officer (CEO) Abhijit Sinha said a blast was reported from a polling booth at Tizit village in Mon district about an hour before the voting started.
"A handmade crude bomb was lobbed at the polling booth at around 5:45 am, in which one village council member, Yanlon, suffered minor injuries in the leg," he said.
However, polling is continuing in the said booth.
There were no other reports of violence from anywhere in the state till 10 am, Sinha said.
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Polling had started at 7 am, but due to malfunctioning of electronic voting machines (EVMs) and voter-verifiable paper audit trail (VVPAT) machines, voting in around 100 polling stations got delayed, the CEO said.
Chief Minister T R Zeliang and his family members cast their votes in Jalukie town of Peren district.
A total of 11,76,432 voters -- 5,97,281 men, 5,79,151 women and 5,884 service voters -- are eligible to exercise their franchise in the Nagaland polls.