Seven people are being questioned by police following clashes involving anti-hunt protesters in East Sussex.
The incident involving hunt supporters and people in balaclavas happened in the Broad Oak area on Tuesday morning. One man suffered serious head injuries.
Nick Onslow, of the East Kent Hunt, said over 30 animal rights extremists strayed onto the private land.
The Hunt Saboteurs Association condemned the arrests and said members were monitoring illegal hunting.
Five men and two women were arrested on suspicion of public order offences.