A doctor from Libya’s eastern city of Benghazi has reached Derna to help and says he and his colleagues are overwhelmed by what they have found.
“We see the huge number of corpses all over the area. It is a disaster completely. I’m shocked, really,” Dr Anas told the BBC’s Today programme.
People in the port city were so traumatised that they were unable to cry, he said.
Many bodies are being laid out in the streets so that relatives can identify loved ones, before being buried in graves dug by a mechanical excavator.
The medic said whole areas had disappeared, buildings had been swept out to sea and others were now buried under mud.