A photo, taken on George V Avenue, showed a van had rolled over on Thursday evening (August 29).
A fire engine and an ambulance were visible in the photo.
South East Coast Ambulance said paramedics were called around 4.20pm ‘following reports of a van overturning in a collision’.
A spokesperson added: “Three patients, a man and two women, were treated at the scene by crews. The two women were taken to Worthing Hospital for further treatment.”