Brentford said they had referred to police an incident during Saturday's 2-1 home defeat to Liverpool in which an item was kicked from a height towards the field of play at the Gtech Community Stadium. A video on social media showed a man on a rooftop near the Gtech Community Stadium kicking a rugby ball towards the pitch.
Club statement
Brentford Football Club said in a statement: "Brentford Football Club is aware of an incident involving an item being kicked from a height towards the field of play during Saturday’s match against Liverpool."
The club said in a statement: "Such behaviour is dangerous and potentially very harmful."
Police referral
The club said in a statement: "The matter has been referred to the police and the club is supporting the relevant authorities in their investigation to help identify those responsible and take appropriate action, which may result in criminal prosecution."
The club said in a statement: "The matchday safety of fans, staff, players and officials is of utmost importance, and the club will support all efforts to ensure action is taken."
Footage from the ground
Another clip from inside the ground showed the rugby ball being taken away from the pitch by a member of staff or coach as play continued.
Match result
Brentford were beaten 2-1 by Liverpool on Saturday.