“The logical explanation is that it was an explosion,” said the official, who works at a morgue in Cairo, and who has seen the 80 pieces of body found so far.
“There isn't even a whole body part, like an arm or a head,” he told the AP news agency.
The official was speaking anonymously as he was not allowed to publicly give information.
The EgyptAir plane crashed into the Mediterranean Sea on Thursday morning last week after taking off from the Charles de Gaulle airport in Paris.
The plane disappeared between the Greek island of Karpathos northeast of Crete and the Egyptian coast.
Officially, the cause of the crash remains unconfirmed, and both Eyptian and French authorities have refused to speculate.
However experts say either terrorist attack of some kind or massive technical failure could be the only possible causes of the crash.
The new findings, although unconfirmed, would add weight to the theory that a bomb may have been placed on board.
However previous reports that computers on board the plane gave alerts for smoke inside the plane before it went down, had suggested the aircraft may have been hit by catastrophic technical failure.
The passengers included 30 Egyptians, 15 French citizens, two Iraqis, two Canadians, and citizens from Algeria, Belgium, Britain, Chad, Portugal, Saudi Arabia and Sudan. They included a boy and two babies.
Seven crew members and three security personnel were also on board.
A life jacket found among the wreckage. Photo: Courtesy of the Egyptian Armed Forces