Identifying all the victims of the Shoreham Airshow disaster could take weeks, it has been revealed.
Coroner Penny Schofield said the investigation was likely to be a "slow and painstaking operation" and appealed for the public to be patient and understanding.
It comes as police warned they were keeping an open mind about the number of victims who may have died when the Hawker Hunter jet ploughed into the A27 in Shoreham at the weekend.
The official estimate of the number of people thought to have died in the tragedy stands at 11 but investigators say further victims may be found as the rest of the aircraft's debris is cleared away.
A picture taken moments before the crash shows half-a-dozen people watching the air show on the verge of the A27 - yards from where the plane came down. Their fate is unknown.
The remains of the plane have been removed from the scene for forensic examination and Assistant Chief Constable Steve Barry said: "As a result of lifting the jet, we have not discovered any evidence of further victims and our estimate of 11 highly likely victims remains in place.
"However, until we have fully completed the search of what is an extensive scene, I must caution that there is still the possibility that we may discover evidence of further victims, but I am not prepared to speculate on that figure."
Police yesterday named a fourth victim - wedding car driver Maurice Abrahams.
The 76-year-old's family described him as "a well-respected and loved father and husband" who "enjoyed his work chauffeuring his beloved Daimler car".
Three other victims were also named: Worthing United players Matthew Grimstone and Jacob Schilt, both 23, and personal trainer Matt Jones, 24.
Motorcyclist Mark Trussler, from Worthing, is missing, while fears have been raised over Daniele Polito, a father from Worthing who was travelling in the same car as Mr Jones when the plane crashed.
Pilot Andrew Hill is fighting for his life after being put into a medically induced coma and he was pulled from the wreckage. It is not known whether he activated the ejector seat.
The Civil Aviation Authority has said "significant" restrictions on UK air shows are now being brought in amid calls for changes following the crash.
Displays by vintage jets over land will be limited to flypasts, which means high energy acrobatics are banned.
An appeal has been put out for members of the public who may have photographed the disaster to come forward.
They can send footage to the Air Accidents Investigation Branch at enquiries@aaib.gov.uk, or to police.
Those wanting to send files to police should contact officers at shoreham.airshow2015@sussex.pnn.police.uk, before sending files.
