Widespread violence was reported on Thursday from various districts, including Siddharthnagar, Sitapur, Gorakhpur, Sambhal during the nomination of papers for the block pramukh elections.
Majority of the incidents took place when the opposition candidates were prevented from filing their nomination papers.
In Siddharthnagar former Uttar Pradesh Assembly Speaker, Mata Prasad Pandey was assaulted.
In Sitapur, three people received bullet injuries when an independent candidate Munni Devi arrived to file her nomination in Kamlapur.
She was prevented from going in and unidentified persons opened fire in the presence of the police. Her supporters created a ruckus and some people lobbed crude bombs.