Brentford call in police after a rugby ball was kicked from a rooftop toward the pitch during the Liverpool match

Brentford want to find the person who turned a nearby rooftop into a kicking tee.

The Premier League club said Monday it has contacted police over a "dangerous" and "potentially very harmful" incident during Saturday's 2-1 loss to Liverpool at the Gtech Community Stadium.

Video on social media shows a man standing on a rooftop near the stadium and kicking a rugby ball toward the pitch while others laugh and cheer. Another clip from inside the ground shows a staff member carrying the ball off the field as play went on.

What the club said

"Such behaviour is dangerous and potentially very harmful," the club said in a statement.

Brentford said the matter has been referred to police. The club is helping the authorities identify those responsible and said action "may result in criminal prosecution."

It added that the safety of "fans, staff, players and officials is of utmost importance."

The match

Brentford finished the game with nine men after Yehor Yarmolyuk and Vitaly Janelt were both sent off in the second half. Alexander Isak scored a late winner as Liverpool came from behind.

The win lifted Liverpool above Brentford into fifth place. Brentford sit sixth.