The Uttar Pradesh police on Monday apprehended four more persons over the Lakhimpur Kheri violence, taking the number of arrests in the episode to 10, said officials.

Eight persons, including four farmers, were killed in the October 3 violence during a farmers' protest in the Tikonia area of the district, with the incident snowballing into a major political controversy over the alleged involvement of a Union minister's son, who is among those arrested in the case.