A student caught up in the derailment of a train near Lewes says his passport and keys to his home are still on the carriage.
Alvin Dybvik Payne, from Seaford, had been visiting his family on a trip back from his university course in Norway when the carriage he was riding in rolled off the tracks, leaving him scrambling to help others to safety.
The economics student, 20, said he could not fly back to Oslo until his belongings, including his laptop with his university work on, were retrieved from the scene.
British Transport Police (BTP) said carriages were not yet safe to access, while Southern and Network Rail said they were "making every effort to reunite passengers with their belongings".
Speaking outside the site cordon, Alvin told
BBC South East Today: "It's quite frustrating due to the fact that it is right over there.
"I could go home to Norway on an emergency passport, but if I did I couldn't get into my flat, I wouldn't be able to go to lectures, and I wouldn't have any of my essentials.
"I know that staff are doing their job, but I was on top of the train, it should be alright to reach a hand in and grab it."
Alvin boarded the 14:24 BST service from London Victoria to Eastbourne at Gatwick Airport before the train derailed at Lewes shortly before 16:00 on Thursday.