Online speculation has claimed Essex Police had called off the search for the four people. An Essex Police spokesman said: "We would ask people not to share footage online but share information with us directly. "If you have any information, CCTV, dash cam or other footage in relation to this incident, then please get in contact with us. "You can let us know by submitting a report on our website or by using our online Live Chat service which is available 24 hours-a-day, seven days-a-week. If you would like to make an anonymous report you can contact independent charity Crimestoppers, by visiting their website or by calling 0800 555 111."