Four people have been arrested at the annual general meeting of oil giant BP in Sunbury.

Police say a group attempted to enter the auditorium of the International Centre for Business and Technology building earlier.

A red liquid is believed to have been thrown.

A 33-year-old man and two women were arrested on suspicion of conspiracy to commit criminal damage.

A 27-year-old woman was also arrested on suspicion of criminal damage and common assault on a security officer.